# Shark Island: scuba diving weather

Boat dive · Koh Tao, Surat Thani · 10.0624, 99.8457

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: 2 kn from SE, gusts 4 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 | 07:00–18:00 | – | up to 0.6 m | up to 11 kn | 30 °C |
| Sun 15 | Excellent 100 | 07:00–18:00 | – | up to 0.1 m | up to 7 kn | 30 °C |
| Mon 16 | Excellent 100 | 07:00–18:00 | – | up to 0.1 m | up to 8 kn | 29 °C |
| Tue 17 | Excellent 100 | 07:00–18:00 | – | up to 0.2 m | up to 8 kn | 30 °C |
| Wed 18 | Excellent 98 | 07:00–18:00 | – | up to 0.5 m | up to 13 kn | 30 °C |
| Thu 19 | Excellent 100 (trend) | 07:00–18:00 | – | up to 0.5 m | up to 13 kn | 30 °C |
| Fri 20 | Excellent 100 (trend) | 07:00–18:00 | – | up to 0.4 m | up to 9 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/surat-thani/koh-tao/shark-island.

## 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 ~13:24
- Sun 15: High ~13:54 · Low ~00:00 (bigger tides, range 1.5 m)
- Mon 16: High ~14:22 · Low ~00:40 (bigger tides, range 1.3 m)
- Tue 17: High ~15:00 · Low ~01:00 (range 1.2 m)
- Wed 18: High ~15:12 · Low ~01:30 (range 1.0 m)
- Thu 19: High ~15:20 · Low ~01:20 (smaller tides, range 0.8 m)
- Fri 20: High ~14:30 · Low ~01:40 (smaller tides, range 0.6 m)

## Conditions at Shark Island

Shark Island is open to the sea from the **NNE–WSW**, 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.

When it's rough here, try [Mae Haad](https://scubaforecast.com/scuba-diving-weather/thailand/surat-thani/koh-tao/mae-haad) (3.8 km, sheltered from the NNE–SSW).

The water stays warm past 40 m.

## Links

- [Forecast page with hourly detail](https://scubaforecast.com/scuba-diving-weather/thailand/surat-thani/koh-tao/shark-island)
- [Water temperature in Surat Thani](https://scubaforecast.com/water-temperature/thailand/surat-thani)
- [Shark Island on the map](https://scubaforecast.com/map#site=shark-island)

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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.