# Kerama Islands snorkeling forecast

Kerama Islands looks marginal today. The least-bad daylight window is around Sun 16:00, but waves is limiting the forecast.

- Location: Kerama Islands, Japan
- Timezone: Asia/Tokyo
- Valid period: next 72 hours from 2026-10-18T04:02:42.561234+09:00
- Verdict: Marginal
- Score: 4.3/10
- Share of next 72h scored OK: 0%
- Source: snapshot
- Generated at: 2026-10-18T01:48:33.915234+09:00
- Conditions can change. HTML page: https://snorkelforecast.com/japan/kerama-islands/
- Forecast JSON: https://snorkelforecast.com/japan/kerama-islands/forecast.json
- Sea temperature: https://snorkelforecast.com/japan/kerama-islands/sea-temperature/
- Sea temperature markdown: https://snorkelforecast.com/japan/kerama-islands/sea-temperature.md
- History JSON: https://snorkelforecast.com/japan/kerama-islands/history.json
- Embed widget: https://snorkelforecast.com/japan/kerama-islands/embed/sea-temperature/
- Current sea temperature: 27.9 °C (82.2 °F)
- Baseline normal for month 10: 28.6 °C (83.5 °F) from 3 sample years
- Sea temperature versus month 10 normal: -0.7 °C (-1.3 °F), cooler than the stored baseline
- Scoring thresholds: waves <= 0.36 m, wind <= 5.4 m/s, current <= 0.36 m/s, water 20.6-30.4 °C. Forecast thresholds, not official safety limits.

## Next 24 hours

| time | rating | score | ok | waves_m | wind_mps | sst_c |
| --- | --- | --- | --- | --- | --- | --- |
| 2026-10-18T05:00:00+09:00 | poor | 0.0 | no | 1.06 | 5.44 | 27.9 |
| 2026-10-18T06:00:00+09:00 | poor | 0.0 | no | 1.02 | 4.35 | 27.9 |
| 2026-10-18T07:00:00+09:00 | poor | 0.0 | no | 1.0 | 5.17 | 27.9 |
| 2026-10-18T08:00:00+09:00 | poor | 0.0 | no | 0.98 | 5.94 | 28.0 |
| 2026-10-18T09:00:00+09:00 | poor | 0.3375203703703704 | no | 0.96 | 6.41 | 28.0 |
| 2026-10-18T10:00:00+09:00 | fair | 0.3755981481481481 | no | 0.96 | 5.75 | 28.0 |
| 2026-10-18T11:00:00+09:00 | fair | 0.36666851851851856 | no | 0.98 | 5.41 | 28.0 |
| 2026-10-18T12:00:00+09:00 | fair | 0.40030555555555547 | no | 0.98 | 4.89 | 28.1 |
| 2026-10-18T13:00:00+09:00 | poor | 0.3378203703703704 | no | 0.98 | 4.79 | 28.1 |
| 2026-10-18T14:00:00+09:00 | poor | 0.32213518518518514 | no | 0.96 | 4.69 | 28.1 |
| 2026-10-18T15:00:00+09:00 | fair | 0.36388148148148153 | no | 0.96 | 4.85 | 28.1 |
| 2026-10-18T16:00:00+09:00 | fair | 0.4270240740740741 | no | 0.96 | 5.44 | 28.1 |
| 2026-10-18T17:00:00+09:00 | fair | 0.4155592592592593 | no | 0.98 | 6.35 | 28.1 |
| 2026-10-18T18:00:00+09:00 | fair | 0.42649814814814807 | no | 0.98 | 6.83 | 28.1 |
| 2026-10-18T19:00:00+09:00 | poor | 0.0 | no | 0.98 | 7.14 | 28.1 |
| 2026-10-18T20:00:00+09:00 | poor | 0.0 | no | 0.98 | 7.29 | 28.0 |
| 2026-10-18T21:00:00+09:00 | poor | 0.0 | no | 0.98 | 6.93 | 28.0 |
| 2026-10-18T22:00:00+09:00 | poor | 0.0 | no | 0.98 | 6.92 | 28.0 |
| 2026-10-18T23:00:00+09:00 | poor | 0.0 | no | 0.98 | 6.96 | 28.0 |
| 2026-10-19T00:00:00+09:00 | poor | 0.0 | no | 0.98 | 6.63 | 28.0 |
| 2026-10-19T01:00:00+09:00 | poor | 0.0 | no | 0.98 | 6.25 | 28.0 |
| 2026-10-19T02:00:00+09:00 | poor | 0.0 | no | 0.96 | 6.2 | 27.9 |
| 2026-10-19T03:00:00+09:00 | poor | 0.0 | no | 0.96 | 6.42 | 27.9 |
| 2026-10-19T04:00:00+09:00 | poor | 0.0 | no | 0.94 | 6.52 | 27.9 |

## Nearby spots

- [Ishigaki](https://snorkelforecast.com/japan/ishigaki/index.md)
- [Miyako](https://snorkelforecast.com/japan/miyako/index.md)
- [Okinawa - Blue Cave](https://snorkelforecast.com/japan/okinawa-blue-cave/index.md)