# Kubajima North Tunnel Course: scuba diving weather

Boat dive · Zamami, Okinawa Prefecture · 26.1805, 127.2319

Updated Sun 15 Nov, 00:30 (Asia/Tokyo). Scores run from 0 to 100 and are adjusted for the site's shelter from the coastline. Times are local.

## Now

- Diving: Fair (44/100), limited by waves
- Waves: 1.4 m
- Wind: 18 kn from SW, gusts 26 kn
- Water: 26 °C at the surface
- Suit: 3 mm wetsuit

## Next days

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

| Day | Best | Window | Limited by | Waves | Wind | Water |
|---|---|---|---|---|---|---|
| Today, Sun 15 | Excellent 89 | 08:00–11:00 | – | up to 1.0 m | up to 15 kn | 26 °C |
| Mon 16 | Excellent 85 | 12:00–18:00 | – | up to 1.2 m | up to 8 kn | 26 °C |
| Tue 17 | Excellent 97 | 07:00–13:00 | – | up to 0.7 m | up to 13 kn | 26 °C |
| Wed 18 | Excellent 100 | 07:00–18:00 | – | up to 0.6 m | up to 12 kn | 26 °C |
| Thu 19 | Poor 28 (trend) | 07:00–10:00 | waves | up to 1.7 m | up to 20 kn | 26 °C |
| Fri 20 | Poor 32 (trend) | 10:00–18:00 | waves | up to 1.5 m | up to 17 kn | 26 °C |
| Sat 21 | Fair 52 (trend) | 07:00–17:00 | waves | up to 1.3 m | up to 21 kn | 26 °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/japan/okinawa-prefecture/zamami/kubajima-north-tunnel-course.

## 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, Sun 15: High ~10:48, ~21:45 · Low ~04:04, ~16:00 (range 1.2 m)
- Mon 16: High ~12:00, ~22:34 · Low ~04:54, ~17:17 (smaller tides, range 1.0 m)
- Tue 17: High ~13:10 · Low ~05:53, ~18:48 (smaller tides, range 0.9 m)
- Wed 18: High ~00:00, ~14:15 · Low ~07:06, ~20:20 (smaller tides, range 0.9 m)
- Thu 19: High ~01:48, ~15:06 · Low ~08:13, ~21:21 (smaller tides, range 1.0 m)
- Fri 20: High ~03:13, ~15:38 · Low ~09:15, ~22:09 (range 1.1 m)
- Sat 21: High ~04:18, ~16:15 · Low ~10:04, ~22:48 (bigger tides, range 1.5 m)

## Conditions at Kubajima North Tunnel Course

Kubajima North Tunnel Course is open to the sea from the **S–N**, so waves build there when the wind blows from those directions. Land shelters it from the E–SSE.

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

When it's rough here, try [Sakubaru Gyosho](https://scubaforecast.com/scuba-diving-weather/japan/okinawa-prefecture/zamami/sakubaru-gyosho) (4.5 km, sheltered from the SW–N).

The water stays warm past 56 m.

## Links

- [Forecast page with hourly detail](https://scubaforecast.com/scuba-diving-weather/japan/okinawa-prefecture/zamami/kubajima-north-tunnel-course)
- [Water temperature in Okinawa Prefecture](https://scubaforecast.com/water-temperature/japan/okinawa-prefecture)
- [Kubajima North Tunnel Course on the map](https://scubaforecast.com/map#site=kubajima-north-tunnel-course)

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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.