Water temperature in Ryōtsu-minato
Sea surface temperature · updated today, Thursday, October 29, at 2:55 pm (GMT+9)- Today
- 70.2–70.2 °F
- Air today
- 49 / 58 °F
- Wed 4
- 68.7 °F
- Wetsuit
- Shorty (springsuit)
Today the water in Ryōtsu-minato is 70.2 °F and ranges 70.2–70.2 °F through the day, with the air between 49 °F and 58 °F. It cools over the next few days: about 68.7 °F by Wednesday 4.
Measured by satellite
This is the temperature satellites measured 2 days ago in the water just below the surface, at the nearest point of sea to Ryōtsu-minato (0.6 mi away), from NASA's MUR analysis, which sees the water in 1 km detail. It isn't a forecast: the big figure above is what a model gives for right now. On sunny afternoons the top of the water can be a little warmer.
Satellite: NASA MUR (JPL MUR MEaSUREs, PO.DAAC), doi:10.5067/GHGMR-4FJ04. Sources and licenses
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 11.7 °F (from August 30).
Over the next few weeks the water looks a bit above normal (+1.1 °F), according to ECMWF 46-day.
Daily average and its range (low and high). The dotted line is the forecast.
Water temperature by month vs. normal
The water off Ryōtsu-minato is warmer than normal for late October today (+1.4 °F).
- 54.0° 54°JanJ
- 50.7° 51°FebF
- 49.6° 50°MarM
- 51.4° 51°AprA
- 57.6° 58°MayM
- 66.2° 66°JunJ
- 73.0° 73°JulJ
- 78.9° 79°AugA
- 76.8° 77°SepS
- 70.7° 71°OctO
- 64.4° 64°NovN
- 59.0° 59°DecD
- Monthly normal
- Today
- Best time
The best time to swim in Ryōtsu-minato is from July to September, when the water averages 73.0–78.9 °F.
The water is warmest in August (78.9 °F on average) and coldest in March (49.6 °F).
Monthly averages for 1991–2020 (NOAA OISST, from satellites and buoys; nearest data point 4.4 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 | 70.2–70.2 °F | 49 / 58 °F | 8.1 ft |
| Fri 30 | 70.0–70.2 °F | 57 / 65 °F | 4.6 ft |
| Sat 31 | 69.6–69.8 °F | 50 / 59 °F | 7.3 ft |
| Sun 1 | 69.4–69.6 °F | 48 / 58 °F | 6.8 ft |
| Mon 2 | 69.3–69.4 °F | 54 / 60 °F | 5.3 ft |
| Tue 3 | 68.9–69.1 °F | 48 / 60 °F | 5.1 ft |
| Wed 4 | 68.5–68.9 °F | 48 / 60 °F | 3.8 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 | 70.5 °F | 70.3–70.7 °F |
| Tue 27 | 70.9 °F | 70.7–71.2 °F |
| Mon 26 | 71.1 °F | 70.9–71.1 °F |
| Sun 25 | 70.9 °F | 70.3–71.2 °F |
| Sat 24 | 71.4 °F | 71.2–71.6 °F |
| Fri 23 | 71.6 °F | 71.6–71.6 °F |
| Thu 22 | 71.8 °F | 71.6–71.8 °F |
Show all 60 days
| Day | Water | Low / high |
|---|---|---|
| Wed 21 | 71.8 °F | 71.2–72.0 °F |
| Tue 20 | 71.8 °F | 71.6–72.0 °F |
| Mon 19 | 72.1 °F | 72.0–72.3 °F |
| Sun 18 | 72.3 °F | 72.3–72.5 °F |
| Sat 17 | 72.5 °F | 72.5–72.5 °F |
| Fri 16 | 72.7 °F | 72.5–72.9 °F |
| Thu 15 | 72.9 °F | 72.7–73.0 °F |
| Wed 14 | 73.2 °F | 72.9–73.6 °F |
| Tue 13 | 73.8 °F | 73.4–74.3 °F |
| Mon 12 | 73.6 °F | 73.6–73.9 °F |
| Sun 11 | 73.9 °F | 73.6–74.3 °F |
| Sat 10 | 74.1 °F | 73.8–74.7 °F |
| Fri 9 | 73.9 °F | 73.8–74.3 °F |
| Thu 8 | 73.9 °F | 73.9–74.3 °F |
| Wed 7 | 74.1 °F | 74.1–74.3 °F |
| Tue 6 | 74.7 °F | 74.3–74.7 °F |
| Mon 5 | 74.8 °F | 74.7–75.0 °F |
| Sun 4 | 75.0 °F | 74.8–75.2 °F |
| Sat 3 | 75.2 °F | 75.2–75.2 °F |
| Fri 2 | 75.6 °F | 75.2–75.6 °F |
| Thu 1 | 75.9 °F | 75.7–76.3 °F |
| Wed 30 | 76.1 °F | 75.9–76.3 °F |
| Tue 29 | 76.5 °F | 76.3–76.5 °F |
| Mon 28 | 76.8 °F | 76.5–77.0 °F |
| Sun 27 | 77.2 °F | 76.8–77.7 °F |
| Sat 26 | 77.2 °F | 77.0–77.2 °F |
| Fri 25 | 77.5 °F | 77.2–77.7 °F |
| Thu 24 | 77.4 °F | 77.0–78.1 °F |
| Wed 23 | 77.5 °F | 77.2–77.7 °F |
| Tue 22 | 77.7 °F | 77.5–77.9 °F |
| Mon 21 | 78.1 °F | 77.9–78.1 °F |
| Sun 20 | 78.1 °F | 77.9–78.6 °F |
| Sat 19 | 78.1 °F | 77.7–78.6 °F |
| Fri 18 | 78.1 °F | 77.9–78.4 °F |
| Thu 17 | 78.1 °F | 77.9–78.3 °F |
| Wed 16 | 78.1 °F | 78.1–78.3 °F |
| Tue 15 | 77.4 °F | 76.8–78.1 °F |
| Mon 14 | 79.0 °F | 78.1–79.3 °F |
| Sun 13 | 79.7 °F | 78.8–80.8 °F |
| Sat 12 | 79.0 °F | 78.8–79.2 °F |
| Fri 11 | 79.2 °F | 79.0–79.2 °F |
| Thu 10 | 79.2 °F | 79.2–79.3 °F |
| Wed 9 | 79.3 °F | 79.0–79.5 °F |
| Tue 8 | 79.7 °F | 79.3–80.4 °F |
| Mon 7 | 79.5 °F | 79.3–79.9 °F |
| Sun 6 | 80.1 °F | 79.9–80.2 °F |
| Sat 5 | 80.4 °F | 80.2–80.6 °F |
| Fri 4 | 80.8 °F | 80.6–81.0 °F |
| Thu 3 | 81.5 °F | 81.1–82.0 °F |
| Wed 2 | 82.2 °F | 81.9–82.6 °F |
| Tue 1 | 82.6 °F | 82.0–83.5 °F |
| Mon 31 | 82.4 °F | 82.0–83.1 °F |
| Sun 30 | 82.2 °F | 82.0–82.8 °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 Ryōtsu-minatoQuestions
What's the water temperature today in Ryōtsu-minato?
70.2 °F; through the day it ranges 70.2–70.2 °F.
Will the water get warmer or colder?
It cools over the next few days: about 68.7 °F by Wednesday 4.
Which wetsuit do I need today?
With the water as it is today, shorty (springsuit) (pleasant). It's a rough guide: it depends on the wind and each person.
How warm is the water in Ryōtsu-minato in October?
In October, the water in Ryōtsu-minato averages 70.7 °F (1991–2020). For a long swim: shorty (springsuit) (pleasant).
How warm is the water in Ryōtsu-minato in August?
In August, the water in Ryōtsu-minato averages 78.9 °F (1991–2020), the warmest of the year. For a long swim: no wetsuit (warm).
When is the best time to swim in Ryōtsu-minato?
The best time to swim in Ryōtsu-minato is from July to September, when the water averages 73.0–78.9 °F. The water is warmest in August (78.9 °F on average) and coldest in March (49.6 °F).
Is the water warmer or colder than normal?
The water off Ryōtsu-minato is warmer than normal for late October today (+1.4 °F).
More about Ryōtsu-minato today
Water temperature near Ryōtsu-minato
- Sado 69.6 °F · 5.7 mi
- Niigata 68.5 °F · 34 mi
- Tsubame 67.8 °F · 39 mi
- Izumozaki 68.5 °F · 40 mi
- Sanjō 69.6 °F · 42 mi
- Seirō 70.3 °F · 45 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 12 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 2:55 pm (local time).
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