Location
Codes & time
America/Toronto
Now: UTC-4
Standard: UTC-5
DST from 08 Mar 2026 03:00 EDT; standard time from 01 Nov 2026 02:00 EST
Contacts
No contacts researched for Ottawa yet. The rescue centre and VHF 16 below always apply.
Nearest rescue centre...
VHF 16distress, safety and calling (156.800 MHz)DSC 70digital selective calling
Active warnings near Ottawa
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Catalogue harbor data
- Area
- Lake Ontario; Great Lakes
- Channel depth (m)
- 1.8
- Anchorage depth (m)
- 9.4
- Harbor size (World Port Index)
- Small
- Harbor type
- River (Natural)
- Shelter
- Excellent
Warnings mentioning this port
Active and archived NAVAREA / coastal messages that reference Ottawa in their text.
NW-C-4311-26 - NW-C-4311-26
CoastalOttawa River and Rideau Canal
NW-C-4311-26 Date 2026-10-12 11:07 UTC Status Published Title Marine Works Areas Ottawa River 1 Vicinity Masson Categories Works in Progress Description Construction operations including riprap reinforcement and cofferdam construction taking place in the vicinity of 45 31.683N 07
NW-C-4280-26 - NW-C-4280-26
CoastalOttawa River and Rideau Canal
NW-C-4280-26 Date 2026-10-08 14:50 UTC Status Published Title Marine Works Areas Ottawa River 1 Vicinity Rideau Hall Categories Works in Progress Description Construction operations taking place Monday to Friday during daylight hours. Barges and workboats on scene and lit at nigh
NW-C-4136-26 - NW-C-4136-26
CoastalOttawa River and Rideau Canal
NW-C-4136-26 Date 2026-09-27 14:10 UTC To 2027-01-01 05:00 UTC Status Published Title Obstruction - Deadheads Areas Ottawa River Vicinity Chats Falls Dam Categories Obstruction (Other) Description Deadheads showing 20 centimetres above the surface reported in the vicinity of 45 2
NW-C-3082-26 - NW-C-3082-26
CoastalSt. Lawrence
NW-C-3082-26 Date 2026-07-20 20:19 UTC Status Published Title Aids to Navigation Areas Ottawa River 2 Vicinity Vaudreuil-Dorion Categories Aids to Navigation (Other) Description Aids to navigation may be unreliable due to low water levels. Position 45° 23.108'N 073° 59.963'W 45°
NW-C-2902-26 - NW-C-2902-26
CoastalOttawa River and Rideau Canal
NW-C-2902-26 Date 2026-07-09 15:30 UTC Status Published Title Aids to Navigation Cancels NW-C-2847-25 Areas Ottawa River 1 Vicinity Papineauville Categories Buoys Aids Papineauville Wharf light buoy HP30 LL 1284.34 Description Replaced on station with unlit red spar buoy. Positio
NW-C-2716-26 - NW-C-2716-26
CoastalOttawa River and Rideau Canal
NW-C-2716-26 Date 2026-06-30 19:59 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Mattawa Categories Lights Aids Marsh Lake Point light LL 1314 Mackey Point light LL 1315 Stonecliffe light LL 1316 Bissett Bay Point light LL 1317 Powell Creek light LL 13
NW-C-2623-26 - NW-C-2623-26
CoastalOttawa River and Rideau Canal
NW-C-2623-26 Date 2026-06-27 19:59 UTC Status Published Title Obstruction - Cement block Areas Ottawa River 1 Vicinity Pointe-au-Chêne Categories Obstruction (Other) Description Cement block visible 60 centimetres above the surface reported at 45 38.165N 074 46.243W. Position 45°
NW-C-2313-26 - NW-C-2313-26
CoastalOttawa River and Rideau Canal
NW-C-2313-26 Date 2026-06-12 01:47 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Ottawa Categories Buoys Aids Deschenes Rapids information buoy 2 Description Permanently relocated to 45 22.489N 075 48.719W. Position 45° 22.489'N 075° 48.719'W Charts 1
NW-C-2310-26 - NW-C-2310-26
CoastalOttawa River and Rideau Canal
NW-C-2310-26 Date 2026-06-12 01:46 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Ottawa Categories Buoys Aids Deschênes Rapids Information Light buoy 1 LL 1297.1 Description Permanently relocated to 45 22.262N 075 48.428W. Position 45° 22.262'N 075° 4
NW-C-2311-26 - NW-C-2311-26
CoastalOttawa River and Rideau Canal
NW-C-2311-26 Date 2026-06-12 01:47 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Ottawa Categories Buoys Aids Deschenes Rapids information light buoy 3 Description Permanently relocated to 45 22.336N 075 48.522W. Position 45° 22.336'N 075° 48.522'W Ch
NW-C-2312-26 - NW-C-2312-26
CoastalOttawa River and Rideau Canal
NW-C-2312-26 Date 2026-06-12 01:47 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Ottawa Categories Buoys Aids Deschenes Rapids information light buoy 5 Description Permanently relocated to 45 22.417N 075 48.612W. Position 45° 22.417'N 075° 48.612'W Ch
NW-C-2314-26 - NW-C-2314-26
CoastalOttawa River and Rideau Canal
NW-C-2314-26 Date 2026-06-12 01:47 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Ottawa Categories Buoys Aids Deschenes Rapids information buoy 4 Description Permanently relocated to 45 22.571N 075 48.820W. Position 45° 22.571'N 075° 48.820'W Charts 1
NW-C-2242-26 - NW-C-2242-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2242-26 Date 2026-06-09 15:31 UTC Status Published Title Aids to Navigation Areas Ottawa River 1 Categories Buoys Aids Rockcliffe Yacht Club information light buoy PRIV LL 1295.86 Rockcliffe Yacht Club information light buoy PRIV LL 1295.9 Rockcliffe Yacht Club information l
NW-C-2930-26 - NW-C-2930-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2930-26 Date 2026-07-11 15:23 UTC Status Published Title Routeing Change - Seasonal Racing Buoys Areas Ottawa River Vicinity Lac Deschênes Categories Regatta or Race Description Nepean Sailing Club and Britannia Yacht Club yellow race markers temporarily established at: A -
NW-C-4219-26 - NW-C-4219-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-4219-26 Date 2026-10-04 19:46 UTC To 2026-10-05 20:30 UTC Status Published Title Lock Closed Areas Ottawa River 1 Vicinity Carillon Categories Lock Closed Description The last lockage of the day will be descending at 051930 UTC Oct 2026 at the Carillon Canal lock. Contact th
NW-C-4061-26 - NW-C-4061-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-4061-26 Date 2026-09-21 11:04 UTC To 2026-09-22 19:00 UTC Status Published Title Lock Closed Areas Ottawa River 1 Vicinity Carillon Categories Lock Closed Description The Carillon Canal lock will be closed to navigation from 221100 UTC until 221800 Sept 2026 for maintenance
NW-C-2474-26 - NW-C-2474-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2474-26 Date 2026-06-22 00:00 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Constance Bay Categories Buoys Description Green spar buoy K9/1 temporarily established in 45 29.668N 076 02.750W. Position 45° 29.668'N 076° 02.750'W
NW-C-2473-26 - NW-C-2473-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2473-26 Date 2026-06-21 23:58 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Constance Bay Categories Buoys Description Red spar buoy K6 temporarily established in 45 29.623N 076 01.967W. Position 45° 29.623'N 076° 01.967'W
NW-C-2239-26 - NW-C-2239-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2239-26 Date 2026-06-09 14:07 UTC Status Published Title Submerged Object Areas Ottawa River 1 Vicinity Hawkesbury Categories Submerged Object Description Submerged Object reported in 45 36.998N 074 36.104W at 091359 UTC Jun 2026. Position 45° 36.998'N 074° 36.104'W Charts
NW-C-3566-26 - NW-C-3566-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-3566-26 Date 2026-08-15 12:04 UTC To 2026-08-15 22:00 UTC Status Published Title Routeing Change Areas Rideau Canal Vicinity Ottawa Categories Regatta or Race Description Hartwells locks 9 and 10 and Hogs Back locks 11 and 12 will be closed to navigation from 151600 UTC Aug
NW-C-2077-26 - NW-C-2077-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2077-26 Date 2026-06-01 18:06 UTC Status Published Title Aids to Navigation Areas Ottawa River 1 Vicinity Upper Duck Island Categories Buoys Aids Duck Island upper green can buoy H441 Description Missing Position 45° 28.286'N 075° 37.347'W Charts 1515(NAD83)
NW-C-3373-26 - NW-C-3373-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-3373-26 Date 2026-08-04 17:21 UTC Status Published Title Waterway information Areas Ottawa River 1 Vicinity Carillon Categories Lock Closed Description Carillon canal lock inoperative due to mechanical failure. Position Centroid : 45° 33.984'N 074° 22.882'W Pt 1: 45° 34.250
NW-C-2626-26 - NW-C-2626-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2626-26 Date 2026-06-28 02:26 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Mattawa Categories Buoys Aids Mackey red spar buoy K76 Mackey Point green spar buoy K77 Stonecliffe green spar buoy K79 Captain Rocher Island red spar buoy K84 West of Sa
NW-C-2632-26 - NW-C-2632-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2632-26 Date 2026-06-28 13:55 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Mattawa Categories Buoys Aids Buoy K96 Description Established in 46 20.768N 078 43.702W. Position 46° 20.768'N 078° 43.702'W Charts 1554(NAD83), 1555(NAD83)
NW-C-2631-26 - NW-C-2631-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2631-26 Date 2026-06-28 13:55 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Deux-Rivières Categories Buoys Aids Bear Point buoy K80 Description Established in 46 15.402N 078 19.105W. Position 46° 15.402'N 078° 19.105'W Charts 1554(NAD83)
NW-C-2630-26 - NW-C-2630-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2630-26 Date 2026-06-28 13:55 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Deux-Rivières Categories Buoys Aids Deux Rivieres buoy K78 Description Established in 46 15.895N 078 16.893W. Position 46° 15.895'N 078° 16.893'W Charts 1554(NAD83)
NW-C-2637-26 - NW-C-2637-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2637-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Deux-Rivières Categories Buoys Aids Bald Rock red spar buoy K94 Description Identifier permanently changed from K94 to K82 Position 46° 17.003'N 078° 22.362'W Charts 1554
NW-C-2634-26 - NW-C-2634-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2634-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Bissett Creek Categories Buoys Aids Deerhorn Rock green spar buoy K89 Description Identifier permanently changed from K89 to K75 Position 46° 16.512'N 078° 09.068'W Chart
NW-C-2635-26 - NW-C-2635-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2635-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Deux-Rivières Categories Buoys Aids West of Moose Bay red spar buoy K90 Description Identifier permanently changed from K90 to K76 Position 46° 16.406'N 078° 13.702'W Cha
NW-C-2636-26 - NW-C-2636-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2636-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Deux-Rivières Categories Buoys Aids East of Deer Point green spar buoy K93 Description Identifier permanently changed from K93 to K79 Position 46° 15.329'N 078° 17.819'W
NW-C-2641-26 - NW-C-2641-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2641-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Mattawa Categories Buoys Aids Mattawa green spar buoy K107 Description Identifier permanently changed from K107 to K93 Position 46° 19.333'N 078° 42.406'W Charts 1554(NAD
NW-C-2633-26 - NW-C-2633-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2633-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Rocher Capitaine Island Categories Buoys Aids Maraboo Point red spar buoy K82 Description Identifier permanently changed from K82 to K74 Position 46° 14.388'N 078° 02.097
NW-C-2642-26 - NW-C-2642-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2642-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Mattawa Categories Buoys Aids Mattawa red spar buoy K108 Description Identifier permanently changed from K108 to K94 Position 46° 19.527'N 078° 42.615'W Charts 1554(NAD83
NW-C-2638-26 - NW-C-2638-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2638-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Mattawa Categories Buoys Aids East of Mattawa red spar buoy K100 Description Identifier permanently changed from K100 to K84 Position 46° 19.093'N 078° 40.788'W Charts 15
NW-C-2640-26 - NW-C-2640-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2640-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Mattawa Categories Buoys Aids Mattawa green spar buoy K103 Description Identifier permanently changed from K103 to K87 Position 46° 19.285'N 078° 42.098'W Charts 1554(NAD
NW-C-2629-26 - NW-C-2629-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2629-26 Date 2026-06-28 13:55 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Rocher Capitaine Island Categories Buoys Aids Maraboo Buoy K72 Description Established in 46 14.483N 078 01.753W. Position 46° 14.483'N 078° 01.753'W Charts 1554(NAD83)
NW-C-2639-26 - NW-C-2639-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2639-26 Date 2026-06-28 16:12 UTC Status Published Title Aids to Navigation Areas Ottawa River Vicinity Mattawa Categories Buoys Aids Mattawa green spar buoy K101 Description Identifier permanently changed from K101 to K85 Position 46° 19.167'N 078° 41.676'W Charts 1554(NAD
NW-C-2988-26 - NW-C-2988-26
CoastalOttawa River and Rideau Canal· Archived
NW-C-2988-26 Date 2026-07-14 23:54 UTC To 2026-07-15 04:00 UTC Status Published Title Recreational event Areas Ottawa River 1 Vicinity Ottawa Categories Fireworks Description Fireworks display taking place from 150200 UTC Jul 2026 until 150300 UTC Jul 2026 launched from a barge a