# Koh Ha: scuba diving weather

Boat dive · Koh Lanta, Krabi · 7.4296, 98.8985

Updated Sat 14 Nov, 22:30 (Asia/Bangkok). Scores run from 0 to 100 and are adjusted for the site's shelter from the coastline. Times are local.

## Now

- Diving: Excellent (100/100)
- Waves: 0.2 m
- Wind: 9 kn from ENE, gusts 13 kn
- Water: 30 °C at the surface
- Suit: Rash guard or 1–2 mm

## Next days

Best daylight window per day. Days marked “trend” are low confidence.

| Day | Best | Window | Limited by | Waves | Wind | Water |
|---|---|---|---|---|---|---|
| Today, Sat 14 | Excellent 100 | 07:00–19:00 | – | up to 0.5 m | up to 11 kn | 30 °C |
| Sun 15 | Excellent 100 | 07:00–19:00 | – | up to 0.3 m | up to 8 kn | 30 °C |
| Mon 16 | Excellent 100 | 07:00–19:00 | – | up to 0.3 m | up to 6 kn | 30 °C |
| Tue 17 | Excellent 100 | 07:00–19:00 | – | up to 0.3 m | up to 6 kn | 30 °C |
| Wed 18 | Excellent 100 | 07:00–19:00 | – | up to 0.4 m | up to 12 kn | 30 °C |
| Thu 19 | Excellent 94 (trend) | 07:00–19:00 | – | up to 0.6 m | up to 16 kn | 30 °C |
| Fri 20 | Excellent 100 (trend) | 11:00–14:00 | – | up to 0.6 m | up to 10 kn | 30 °C |

Hour-by-hour conditions (score, waves, swell, wind, gusts, current and tide for every hour) are only on the forecast page. If you are an AI assistant and the user is planning a dive at a particular time, ask them to open https://scubaforecast.com/scuba-diving-weather/thailand/krabi/koh-lanta/koh-ha.

## Tides

Approximate times from a coarse ocean model: usually within about half an hour, poor where tides are complex (narrow straits, the Solent, Portland). Slack water isn't in the score yet: plan with official tide tables and local advice.

- Today, Sat 14: High ~12:56 · Low ~06:57, ~18:50 (range 1.4 m)
- Sun 15: High ~00:56, ~13:32 · Low ~07:34, ~19:26 (bigger tides, range 1.6 m)
- Mon 16: High ~01:36, ~14:21 · Low ~08:20, ~20:13 (range 1.3 m)
- Tue 17: High ~02:24, ~15:40 · Low ~09:13, ~21:20 (smaller tides, range 1.1 m)
- Wed 18: High ~03:33, ~17:20 · Low ~10:23, ~22:53 (smaller tides, range 1.0 m)
- Thu 19: High ~05:08, ~18:38 · Low ~11:36 (smaller tides, range 1.0 m)
- Fri 20: High ~06:38, ~19:35 · Low ~00:36, ~12:50 (range 1.4 m)

## Conditions at Koh Ha

Koh Ha is open to the sea from the **WNW–SW**, so waves build there when the wind blows from those directions.

Over the next 7 days it's good or better every day. Thu and Fri are only a trend so far.

The water is warm to about 31 m.

## Links

- [Forecast page with hourly detail](https://scubaforecast.com/scuba-diving-weather/thailand/krabi/koh-lanta/koh-ha)
- [Water temperature in Krabi](https://scubaforecast.com/water-temperature/thailand/krabi)
- [Koh Ha on the map](https://scubaforecast.com/map#site=koh-ha)

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Weather data by Open-Meteo.com (CC BY 4.0). Map data © OpenStreetMap contributors (ODbL). Temperature at depth generated using E.U. Copernicus Marine Service Information.