Water temperature in Ban I Let
Sea surface temperature · updated today, Thursday, October 29, at 11:54 am (GMT+7)- Today
- 85.5–85.8 °F
- Air today
- 79 / 82 °F
- Wed 4
- 86.5 °F
- Wetsuit
- No wetsuit
Today the water in Ban I Let is 85.6 °F and ranges 85.5–85.8 °F through the day, with the air between 79 °F and 82 °F. It stays steady over the next few days.
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 Ban I Let (2.2 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 risen 0.9 °F (from August 30).
Over the next few weeks the water looks above normal (+2.0 °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 Ban I Let is warmer than normal for late October today (+2.4 °F).
- 81.7° 82°JanJ
- 82.8° 83°FebF
- 84.4° 84°MarM
- 86.0° 86°AprA
- 86.4° 86°MayM
- 85.5° 85°JunJ
- 84.7° 85°JulJ
- 84.3° 84°AugA
- 84.0° 84°SepS
- 83.9° 84°OctO
- 83.2° 83°NovN
- 82.0° 82°DecD
- Monthly normal
- Today
In Ban I Let the water is pleasant year-round: 81.7–86.4 °F on average, depending on the month.
The water is warmest in May (86.4 °F on average) and coldest in January (81.7 °F).
Monthly averages for 1991–2020 (NOAA OISST, from satellites and buoys; nearest data point 8.7 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 | 85.5–85.8 °F | 79 / 82 °F | 2.2 ft |
| Fri 30 | 85.1–85.6 °F | 78 / 83 °F | 2.0 ft |
| Sat 31 | 85.1–85.8 °F | 79 / 83 °F | 1.1 ft |
| Sun 1 | 85.5–86.4 °F | 76 / 85 °F | 1.1 ft |
| Mon 2 | 85.8–86.5 °F | 75 / 83 °F | 0.5 ft |
| Tue 3 | 86.0–86.5 °F | 76 / 83 °F | 0.5 ft |
| Wed 4 | 86.2–86.7 °F | 77 / 83 °F | 0.7 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 | 86.2 °F | 85.8–86.7 °F |
| Tue 27 | 87.1 °F | 86.7–87.4 °F |
| Mon 26 | 87.8 °F | 87.4–88.3 °F |
| Sun 25 | 88.2 °F | 87.6–88.7 °F |
| Sat 24 | 88.0 °F | 87.4–88.3 °F |
| Fri 23 | 87.8 °F | 87.1–88.3 °F |
| Thu 22 | 87.3 °F | 86.7–88.0 °F |
Show all 60 days
| Day | Water | Low / high |
|---|---|---|
| Wed 21 | 87.3 °F | 87.1–87.6 °F |
| Tue 20 | 87.8 °F | 87.6–87.8 °F |
| Mon 19 | 88.2 °F | 87.8–88.7 °F |
| Sun 18 | 88.7 °F | 88.5–88.9 °F |
| Sat 17 | 88.9 °F | 88.3–89.4 °F |
| Fri 16 | 88.5 °F | 87.8–89.1 °F |
| Thu 15 | 88.0 °F | 87.6–88.3 °F |
| Wed 14 | 87.8 °F | 87.6–88.2 °F |
| Tue 13 | 88.0 °F | 87.6–88.2 °F |
| Mon 12 | 88.0 °F | 87.8–88.2 °F |
| Sun 11 | 88.0 °F | 87.8–88.3 °F |
| Sat 10 | 88.0 °F | 87.6–88.2 °F |
| Fri 9 | 88.0 °F | 87.6–88.5 °F |
| Thu 8 | 88.0 °F | 87.4–88.3 °F |
| Wed 7 | 88.0 °F | 87.8–88.3 °F |
| Tue 6 | 88.2 °F | 87.4–88.7 °F |
| Mon 5 | 87.8 °F | 87.3–88.5 °F |
| Sun 4 | 87.6 °F | 87.3–88.2 °F |
| Sat 3 | 87.6 °F | 86.9–88.3 °F |
| Fri 2 | 87.4 °F | 86.5–88.2 °F |
| Thu 1 | 86.9 °F | 86.0–87.6 °F |
| Wed 30 | 86.4 °F | 85.5–87.1 °F |
| Tue 29 | 85.6 °F | 85.1–86.4 °F |
| Mon 28 | 85.3 °F | 84.7–85.6 °F |
| Sun 27 | 84.9 °F | 84.9–85.1 °F |
| Sat 26 | 85.3 °F | 85.1–85.6 °F |
| Fri 25 | 85.6 °F | 85.3–85.8 °F |
| Thu 24 | 85.5 °F | 85.3–85.6 °F |
| Wed 23 | 85.8 °F | 85.6–86.2 °F |
| Tue 22 | 86.4 °F | 86.0–86.7 °F |
| Mon 21 | 86.2 °F | 85.5–86.9 °F |
| Sun 20 | 85.6 °F | 85.3–85.8 °F |
| Sat 19 | 85.5 °F | 85.3–85.6 °F |
| Fri 18 | 85.8 °F | 85.6–86.0 °F |
| Thu 17 | 85.8 °F | 85.6–86.2 °F |
| Wed 16 | 85.8 °F | 85.6–86.2 °F |
| Tue 15 | 85.8 °F | 85.1–86.4 °F |
| Mon 14 | 85.3 °F | 84.9–85.6 °F |
| Sun 13 | 85.3 °F | 85.3–85.5 °F |
| Sat 12 | 85.5 °F | 85.5–85.6 °F |
| Fri 11 | 85.8 °F | 85.6–85.8 °F |
| Thu 10 | 86.2 °F | 86.0–86.5 °F |
| Wed 9 | 86.5 °F | 86.4–86.7 °F |
| Tue 8 | 86.5 °F | 86.2–86.9 °F |
| Mon 7 | 86.5 °F | 86.2–86.9 °F |
| Sun 6 | 86.5 °F | 86.2–86.7 °F |
| Sat 5 | 86.4 °F | 86.0–86.7 °F |
| Fri 4 | 86.4 °F | 85.8–86.5 °F |
| Thu 3 | 86.2 °F | 85.8–86.5 °F |
| Wed 2 | 86.0 °F | 85.8–86.4 °F |
| Tue 1 | 85.8 °F | 85.3–86.2 °F |
| Mon 31 | 85.5 °F | 85.1–85.8 °F |
| Sun 30 | 85.3 °F | 84.9–85.6 °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 Ban I LetQuestions
What's the water temperature today in Ban I Let?
85.6 °F; through the day it ranges 85.5–85.8 °F.
Will the water get warmer or colder?
It stays steady over the next few days.
Which wetsuit do I need today?
With the water as it is today, no wetsuit (warm). It's a rough guide: it depends on the wind and each person.
How warm is the water in Ban I Let in October?
In October, the water in Ban I Let averages 83.9 °F (1991–2020). For a long swim: no wetsuit (warm).
How warm is the water in Ban I Let in May?
In May, the water in Ban I Let averages 86.4 °F (1991–2020), the warmest of the year. For a long swim: no wetsuit (warm).
When is the best time to swim in Ban I Let?
In Ban I Let the water is pleasant year-round: 81.7–86.4 °F on average, depending on the month. The water is warmest in May (86.4 °F on average) and coldest in January (81.7 °F).
Is the water warmer or colder than normal?
The water off Ban I Let is warmer than normal for late October today (+2.4 °F).
More about Ban I Let today
Water temperature near Ban I Let
- Koh Tao 85.5 °F · 45 mi
- Ranong 87.3 °F · 50 mi
- Kawthaung 86.9 °F · 54 mi
- Bang Saphan 86.4 °F · 60 mi
- Ko Pha Ngan 85.6 °F · 69 mi
- Bokpyin 86.7 °F · 69 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 3.8 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 11:54 am (local time).
Spotted a mistake? Tell us · Where the weather and sea data come from