# Upolu Cay: scuba diving weather

Boat dive · Cairns, Queensland · -16.6690, 145.9337

Updated Sun 15 Nov, 01:30 (Australia/Brisbane). 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: 0.5 m
- Wind: 8 kn from E, gusts 12 kn
- Water: 28 °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, Sun 15 | Excellent 100 | 06:00–19:00 | – | up to 0.5 m | up to 9 kn | 28 °C |
| Mon 16 | Excellent 100 | 06:00–19:00 | – | up to 0.4 m | up to 8 kn | 28 °C |
| Tue 17 | Excellent 100 | 06:00–19:00 | – | up to 0.3 m | up to 7 kn | 28 °C |
| Wed 18 | Excellent 100 | 06:00–19:00 | – | up to 0.5 m | up to 14 kn | 28 °C |
| Thu 19 | Excellent 84 (trend) | 06:00–19:00 | – | up to 0.9 m | up to 17 kn | 28 °C |
| Fri 20 | Good 77 (trend) | 17:00–19:00 | – | up to 1.0 m | up to 17 kn | 29 °C |
| Sat 21 | Excellent 87 (trend) | 06:00–19:00 | – | up to 0.9 m | up to 15 kn | 29 °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/australia/queensland/cairns/upolu-cay.

## 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 ~14:50 · Low ~03:40 (smaller tides, range 1.0 m)
- Mon 16: High ~15:40 · Low ~23:50 (smaller tides, range 1.0 m)
- Tue 17: High ~05:00, ~16:20 · Low ~09:13, ~23:40 (range 1.2 m)
- Wed 18: High ~05:12, ~16:47 · Low ~10:16, ~23:42 (range 1.4 m)
- Thu 19: High ~05:38, ~17:11 · Low ~11:00, ~23:56 (bigger tides, range 1.6 m)
- Fri 20: High ~06:04, ~17:37 · Low ~11:41 (range 1.2 m)
- Sat 21: High ~06:36, ~18:08 · Low ~00:19, ~12:24 (bigger tides, range 1.7 m)

## Conditions at Upolu Cay

Upolu Cay is open to the sea from the **S–SE**, so waves build there when the wind blows from those directions.

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

The water stays warm past 16 m.

## Links

- [Forecast page with hourly detail](https://scubaforecast.com/scuba-diving-weather/australia/queensland/cairns/upolu-cay)
- [Water temperature in Queensland](https://scubaforecast.com/water-temperature/australia/queensland)
- [Upolu Cay on the map](https://scubaforecast.com/map#site=upolu-cay)

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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.