Water temperature in La Roche-Derrien
Sea surface temperature · updated today, Thursday, October 29, at 1:57 am (CET)- Today
- 59.5–59.7 °F
- Air today
- 40 / 58 °F
- Wed 4
- 58.8 °F
- Wetsuit
- 4/3 mm
Today the water in La Roche-Derrien is 59.7 °F and ranges 59.5–59.7 °F through the day, with the air between 40 °F and 58 °F. It cools over the next few days: about 58.8 °F by Wednesday 4.
The water over the next few days
- Today
- Fri 30
- Sat 31
- Sun 1
- Mon 2
- Tue 3
- Wed 4
- Thu 5
- Fri 6
- Sat 7
Water over the last 60 days
Over these days it has dropped 6.8 °F (from August 30).
Daily average and its range (low and high). The dotted line is the forecast.
Water temperature by month vs. normal
The water off La Roche-Derrien is about normal for late October today.
- 50.9° 51°JanJ
- 49.4° 49°FebF
- 49.0° 49°MarM
- 50.5° 50°AprA
- 53.2° 53°MayM
- 56.9° 57°JunJ
- 60.2° 60°JulJ
- 62.4° 62°AugA
- 62.4° 62°SepS
- 60.2° 60°OctO
- 56.9° 57°NovN
- 53.6° 54°DecD
- Monthly normal
- Today
- Best time
In La Roche-Derrien the water is cold all year: it is warmest in August (62.4 °F on average). For a long swim, wear a wetsuit.
The water is warmest in August (62.4 °F on average) and coldest in March (49.0 °F).
Monthly averages for 1991–2020 (NOAA OISST, from satellites and buoys; nearest data point 10 mi away). Right by the shore, the water can be a little colder or warmer. Sources and licenses
Water and air, day by day
| Day | Water | Air | Max wave |
|---|---|---|---|
| Today | 59.5–59.7 °F | 40 / 58 °F | 2.3 ft |
| Fri 30 | 59.5–59.5 °F | 37 / 58 °F | 1.7 ft |
| Sat 31 | 59.4–59.5 °F | 38 / 56 °F | 1.8 ft |
| Sun 1 | 59.4–59.4 °F | 47 / 58 °F | 2.1 ft |
| Mon 2 | 59.2–59.4 °F | 49 / 57 °F | 2.4 ft |
| Tue 3 | 58.8–59.2 °F | 53 / 57 °F | 2.5 ft |
| Wed 4 | 58.8–58.8 °F | 47 / 54 °F | 2.7 ft |
Which wetsuit to wear
| Water | Wetsuit | How it feels |
|---|---|---|
| < 52 °F | 6/5 mm with hood, booties and gloves | Very cold: full kit only |
| 52°–57 °F | 5/4 mm with booties | Cold: takes your breath away |
| 57°–63 °F | 4/3 mm | Cool |
| 63°–66 °F | 3/2 mm | Mild |
| 66°–72 °F | Shorty (springsuit) | Pleasant |
| 72°–75 °F | Rash guard or top | Very pleasant |
| > 75 °F | No wetsuit | Warm |
A rough guide: it depends on the wind, how long you stay in and each person.
Fish are cold-blooded: the water sets their activity. Sudden temperature changes usually put them off the bite; with steady water, activity is more regular.
Previous days
The water over the last 60 days.
| Day | Water | Low / high |
|---|---|---|
| Wed 28 | 59.7 °F | 59.7–59.7 °F |
| Tue 27 | 60.1 °F | 59.7–60.1 °F |
| Mon 26 | 60.1 °F | 60.1–60.3 °F |
| Sun 25 | 60.6 °F | 60.1–61.0 °F |
| Sat 24 | 61.0 °F | 61.0–61.2 °F |
| Fri 23 | 61.7 °F | 61.2–62.1 °F |
| Thu 22 | 62.1 °F | 62.1–62.2 °F |
Show all 60 days
| Day | Water | Low / high |
|---|---|---|
| Wed 21 | 62.4 °F | 62.2–62.4 °F |
| Tue 20 | 62.4 °F | 62.4–62.6 °F |
| Mon 19 | 62.6 °F | 62.4–62.6 °F |
| Sun 18 | 63.0 °F | 62.6–63.3 °F |
| Sat 17 | 63.7 °F | 63.3–64.0 °F |
| Fri 16 | 64.2 °F | 64.0–64.4 °F |
| Thu 15 | 64.4 °F | 64.2–64.4 °F |
| Wed 14 | 64.4 °F | 64.2–64.6 °F |
| Tue 13 | 64.4 °F | 64.2–64.4 °F |
| Mon 12 | 64.0 °F | 64.0–64.2 °F |
| Sun 11 | 64.0 °F | 64.0–64.0 °F |
| Sat 10 | 64.2 °F | 64.2–64.4 °F |
| Fri 9 | 64.6 °F | 64.4–64.6 °F |
| Thu 8 | 64.6 °F | 64.6–64.9 °F |
| Wed 7 | 65.3 °F | 65.1–65.3 °F |
| Tue 6 | 65.1 °F | 64.9–65.5 °F |
| Mon 5 | 64.9 °F | 64.8–65.3 °F |
| Sun 4 | 64.8 °F | 64.6–64.9 °F |
| Sat 3 | 64.6 °F | 64.4–64.8 °F |
| Fri 2 | 64.6 °F | 64.4–64.8 °F |
| Thu 1 | 64.6 °F | 64.4–64.8 °F |
| Wed 30 | 64.9 °F | 64.2–66.4 °F |
| Tue 29 | 66.0 °F | 65.8–66.4 °F |
| Mon 28 | 66.0 °F | 65.8–66.0 °F |
| Sun 27 | 66.2 °F | 66.0–66.6 °F |
| Sat 26 | 66.6 °F | 66.4–66.7 °F |
| Fri 25 | 66.6 °F | 66.4–66.7 °F |
| Thu 24 | 66.7 °F | 66.4–67.1 °F |
| Wed 23 | 66.6 °F | 66.2–66.7 °F |
| Tue 22 | 66.6 °F | 66.4–66.9 °F |
| Mon 21 | 66.6 °F | 66.2–67.1 °F |
| Sun 20 | 66.4 °F | 66.2–66.4 °F |
| Sat 19 | 66.4 °F | 66.2–66.4 °F |
| Fri 18 | 66.4 °F | 66.4–66.6 °F |
| Thu 17 | 66.6 °F | 66.6–66.9 °F |
| Wed 16 | 66.9 °F | 66.7–67.1 °F |
| Tue 15 | 67.5 °F | 67.3–67.8 °F |
| Mon 14 | 67.6 °F | 67.1–68.2 °F |
| Sun 13 | 67.3 °F | 66.9–67.5 °F |
| Sat 12 | 67.1 °F | 66.9–67.3 °F |
| Fri 11 | 67.1 °F | 66.7–67.3 °F |
| Thu 10 | 67.1 °F | 66.9–67.1 °F |
| Wed 9 | 67.1 °F | 66.9–67.3 °F |
| Tue 8 | 67.3 °F | 67.3–67.5 °F |
| Mon 7 | 67.5 °F | 67.3–67.8 °F |
| Sun 6 | 67.3 °F | 66.7–68.4 °F |
| Sat 5 | 66.9 °F | 66.6–67.5 °F |
| Fri 4 | 66.6 °F | 66.6–66.7 °F |
| Thu 3 | 66.6 °F | 66.2–66.7 °F |
| Wed 2 | 66.4 °F | 66.0–66.6 °F |
| Tue 1 | 66.4 °F | 65.8–66.7 °F |
| Mon 31 | 66.2 °F | 66.0–66.4 °F |
| Sun 30 | 66.6 °F | 66.4–66.6 °F |
It's the daily analysis from Météo-France / Copernicus Marine (satellites, buoys and model), not a buoy reading at this spot.
Questions about the water in La Roche-DerrienQuestions
What's the water temperature today in La Roche-Derrien?
59.7 °F; through the day it ranges 59.5–59.7 °F.
Will the water get warmer or colder?
It cools over the next few days: about 58.8 °F by Wednesday 4.
Which wetsuit do I need today?
With the water as it is today, 4/3 mm (cool). It's a rough guide: it depends on the wind and each person.
How warm is the water in La Roche-Derrien in October?
In October, the water in La Roche-Derrien averages 60.2 °F (1991–2020). For a long swim: 4/3 mm (cool).
How warm is the water in La Roche-Derrien in August?
In August, the water in La Roche-Derrien averages 62.4 °F (1991–2020), the warmest of the year. For a long swim: 4/3 mm (cool).
When is the best time to swim in La Roche-Derrien?
In La Roche-Derrien the water is cold all year: it is warmest in August (62.4 °F on average). For a long swim, wear a wetsuit. The water is warmest in August (62.4 °F on average) and coldest in March (49.0 °F).
Is the water warmer or colder than normal?
The water off La Roche-Derrien is about normal for late October today.
More about La Roche-Derrien today
Water temperature near La Roche-Derrien
- Lézardrieux 59.7 °F · 7.4 mi
- Louannec 59.5 °F · 7.6 mi
- Locquirec 59.2 °F · 18 mi
- Saint-Quay-Portrieux 59.5 °F · 21 mi
- Binic 58.6 °F · 22 mi
- Morlaix 59.5 °F · 28 mi
Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.
Learn more
Sea surface temperature: Open-Meteo with Météo-France / Copernicus Marine, CC BY 4.0; grid point 9.0 mi away. Near the shore, in coves and estuaries, the water can be a little colder or warmer.
Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 1:57 am (local time).
Spotted a mistake? Tell us · Where the weather and sea data come from