Coghlan Rock
Dive site · Canada
Advanced divers and up
Is it worth the trip?
62Good out of 100 for your dates
2 days tie for best
Tue 3 · 64 out of 100
- Sea
- 0.1 mflat
- Wind
- 2 kn
- Gusts
- 8kn
- Air
- 14°C
Wed 4 · 65 out of 100
- Sea
- 0.1 mflat
- Wind
- 2 kn
- Gusts
- 4kn
- Air
- 10°C
Thu 5 · 64 out of 100
- Sea
- 0.2 mflat
- Wind
- 3 kn
- Gusts
- 14kn
- Air
- 11°C
Fri 6 · 32 out of 100
- Sea
- 0.3 m
- Wind
- 1 kn
- Gusts
- 9knboats in
- Air
- 11°C
Sat 7 · 63 out of 100
- Sea
- 0.2 mflat
- Wind
- 6 kn
- Gusts
- 20kn
- Air
- 9°C
Sun 8 · 64 out of 100
- Sea
- 0.2 mflat
- Wind
- 2 kn
- Gusts
- 12kn
- Air
- 11°C
Mon 9 · 65 out of 100
- Sea
- 0.1 mflat
- Wind
- 1 kn
- Gusts
- 10kn
- Air
- 12°C
Tap a day for sea, wind and water. Full forecast
Forecast: next 9 days
Full forecast- Mon 264, good
- Tue 364, good
- Wed 465, good
- Thu 564, good
- Fri 632, poor
- Sat 763, good
- Sun 864, good
- Mon 965, good
- Tue 1061, good
The site in five facts
- Down to 18 mits deepest
- From a boathow you get in
- Advancedand up
- Water 9 °Cdrysuit
- Faces SEswell from there reaches it
Full forecast
every day, every number
The score doesn't know currents, the visibility on the day or your certification.
Suits Advanced divers and up, as a dive guide states it. Scored for Advanced divers.
| Day | Score | Sea | Wind | Gusts | Air |
|---|---|---|---|---|---|
| Mon 2Nov | 64, good | 0.1 mflat | 2 kn | 7kn | 11°C |
| Tue 3Nov | 64, good | 0.1 mflat | 2 kn | 8kn | 14°C |
| Wed 4Nov | 65, good | 0.1 mflat | 2 kn | 4kn | 10°C |
| Thu 5Nov | 64, good | 0.2 mflat | 3 kn | 14kn | 11°C |
| Fri 6Nov | 32, poor | 0.3 m | 1 kn | 9knboats in | 11°C |
| Sat 7Nov | 63, good | 0.2 mflat | 6 kn | 20kn | 9°C |
| Sun 8Nov | 64, good | 0.2 mflat | 2 kn | 12kn | 11°C |
| Mon 9Nov | 65, good | 0.1 mflat | 1 kn | 10kn | 12°C |
| Tue 10Nov | 61, good | 0.3 m | 6 kn | 22kn | 13°C |
Sea is the waves near the site, in metres; wind and gusts in knots. "Boats in": gusts that keep dive boats in. More
Tide
- Mon 2 NovLow 00:15 −1.5 mHigh 06:56 +0.8 mLow 12:58 −0.4 mHigh 18:20 +0.8 m
- Tue 3 NovLow 01:26 −1.3 mHigh 07:59 +0.9 mLow 14:20 −0.7 mHigh 19:51 +0.8 m
- Wed 4 NovLow 02:32 −1.2 mHigh 08:51 +1.1 mLow 15:25 −1.0 mHigh 21:13 +0.8 m
Local clock times; heights about mean sea level. On open coasts the times are usually within a quarter of an hour; in bays, estuaries and on the Gulf of Mexico they can be an hour or more out. Slack water, the safest time to dive where there is current, is about half an hour either side of each high and low. Tide: EOT20 global ocean tide model, Hart-Davis et al. 2021, DGFI-TUM (doi:10.17882/79489), CC BY 4.0. Times and heights computed by us. A model, not a tide table: check a local table before you go.
Forecast updated . It refreshes every three hours. Forecast data: ECMWF, DWD, Météo-France and NOAA, served by Open-Meteo.com (CC BY 4.0). Changed by us. Generated using E.U. Copernicus Marine Service Information.
Map
the site, its town, photos
Coghlan Rock on Google Maps · Directions
Each place wears its best day on these dates: green good, amber fair, pale red poor, as the key says.
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One finger scrolls the page; two fingers move the map. Pins are our own positions. Map OpenFreeMap, © OpenMapTiles, data © OpenStreetMap contributors.
Photos of Coghlan Rock
More diving near here
5 places
- Barnard Castle 10.1 km away
- Race Rocks - Great Race 11.2 km away
- Race Rocks - West and Central 11.2 km away
- Race Rocks 11.3 km away
- Swordfish Island 12 km away
About
the place in full, sources, credits
About Coghlan Rock
A reef dive. It goes down to 18 m. You get in from a boat. It suits Advanced divers and up, as a dive guide states it. The coast faces SE: swell from the SE reaches it, and wind from the NW blows out to sea. 3 dive centres or shops within 10 km, the nearest 6.0 km away. The sea is about 8°C in January, its coldest month (drysuit), and 12°C in August, its warmest (7 mm semi-dry or a drysuit). The town to stay in is Colwood. Within 5 km we also list 1 surf spot.
- What it is Reef.
- How deep Down to 18 m.
- Getting in From a boat.
- Who it suits Suits Advanced divers and up, as a dive guide states it.
- Dive centres 3 dive centres or shops within 10 km, the nearest 6.0 km away.
Water about 9°C: drysuit. Typical sea temperature for the time of year, not a forecast.
Visibility about 6 m. Typical for the time of year, estimated from ten years of NASA satellite water clarity, not a forecast. Clearest in Jan, Feb, Mar, Apr, Sep, Oct and Nov (about 6 m).
The score is the conditions only: the journey, the price and the partners never change it (how we score, how we earn).
Rough cost (estimate): about US$965–US$1,780 each
about US$965–US$1,780 each · 6 nights, 2 sharing: flights, hire car, stay, food.
Our estimate from typical public prices, not a quote: check the real prices before you book (where they come from). Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 30 October 2026.
How we worked it out
| What | How we worked it out | Each |
|---|---|---|
| Flights | return MDW to SEA, estimated from distance and season, 1 airline on the route, with a hold bag | about US$248–US$516 |
| Hire car | 6 days, shared | about US$134–US$228 |
| Stay | 6 nights, a mid-range double, shared | about US$275–US$456 |
| Food | 7 days eating out | about US$308–US$576 |
| Total | about US$965–US$1,780 |
Guided dives are not priced yet: we have no sourced price, so it is not in it. Prices from public sources, checked in 2026.
Where to stay: Colwood
about 10 min by car · 8 places to stay
about US$100/nightcountry average
About Colwood its beds, food and every spot near it
About US$100 a night is our estimate of the country's average 2-star double room that month: not each town's price, and not a quote. Drives are estimates. Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 30 October 2026.
Getting there: about 8h 45m
About 8h 45m door to door from Chicago
Fly MDW → SEA, direct, then 2h 40m by road
Flights MDW → SEA on your dates · Skyscanner
An estimate, one way; the journey never changes the score.
In the water
Dives and courses in Colwood · GetYourGuideDive gear hire in Colwood · GetYourGuide
Dive centres nearby
Wilson Diving 6.0 km
Ogden Point Dive Centre 7.3 km
East 2 West Freediving 9.4 km
The nearest named dive centres and shops within 25 km, in a straight line; training agencies where the map states them. Listings, not a recommendation. Dive centres: © OpenStreetMap contributors (ODbL). Credits
What you might see
Too few open records near this site to list its animals. Ask a dive centre what you are likely to see.
This week's visibility, the current and the life no free forecast gives. Ask a dive centre before you book.