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Chuns Reef Surf Forecast
/ HAW – Oahu (122 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Chuns Reef surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 pm Thursday 21 May 2026 HSTForecast update in hr min s Forecast update imminent
Chuns Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Chuns Reef sea temperature is
25.6° C
(Which is normal for this time of year)How big are the waves at Chuns Reef today?
The current surf forecast for Chuns Reef at 7PM is: 3.0m 8s primary swell from a East-northeast direction and 0.4m 10s secondary swell from a Northwest direction (forecast issued at 01:00pm May 21). An open ocean swell of 0.2m 15s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 11.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 8ft (2.5m) | 8s |
| Afternoon (21 May) | 8ft (2.5m) | 8s |
| Evening (21 May) | 10ft (3.0m) | 8s |
Table - waves today at Chuns Reef. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Sat morning. Warm (max 24°C on Thu afternoon, min 22°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
932 | 932 | 1024 | 1121 | 1225 | 1175 | 1048 | 975 | 905 | 912 | 1014 | 973 | 899 | 850 | 870 | 808 | 1047 | 1094 | 989 | 890 | 869 | 869 | 909 | 943 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 7:36PM0.48m | 9:08AM0.16m | 8:32PM0.43m | 10:27AM0.22m | 9:26PM0.37m | |||||||||||||||||||
Low Tide | 10:46AM0.04m | 2:21AM-0.00m | 12:11PM0.09m | 3:02AM-0.01m | 1:55PM0.14m | 3:36AM-0.02m | ||||||||||||||||||
 | | |  |  | | | | | | | | | | |  |  | | | | | | | | |
 | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — |
 | — | — | 7:06 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | 7:07 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | |
Temp °C | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 22 | 22 | 23 |
20 | 20 | 20 | 19 | 19 | 19 | 19 | 20 | 19 | 20 | 20 | 19 | 20 | 20 | 19 | 19 | 18 | 20 | 20 | 20 | 19 | 19 | 19 | 20 | |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NW 10 | NW 10 | NW 10 | NNW 9 | NW 10 | NW 10 | NW 10 | NNW 10 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NNW 16 | NNW 16 | NNW 15 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 |
 kJ | 19 | 24 | 24 | 23 | 8 | 25 | 25 | 25 | 41 | 56 | 57 | 57 | 57 | 56 | 53 | 51 | 102 | 162 | 191 | 211 | 191 | 180 | 175 | 234 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 14 | S 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | S 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | NNW 19 | NNW 18 | NW 17 | NW 10 | NW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NW 10 | S 14 |
| kJ | 16 | 20 | 5 | 22 | 21 | 21 | 21 | 17 | 21 | 20 | 18 | 18 | 18 | 35 | 31 | 74 | 50 | 50 | 39 | 25 | 24 | 24 | 24 | 16 |
Swell 3 Height (m) Direction Period (s) | NW 9 | S 16 | SW 12 | SW 14 | NNW 11 | S 13 | S 13 | S 12 | S 12 | S 18 | S 18 | S 18 | S 17 | SSW 13 | S 16 | S 16 | SSW 13 | S 16 | S 13 | S 15 | S 15 | S 15 | S 14 | S 16 |
| kJ | 3 | 5 | 6 | 8 | 11 | 3 | 3 | 3 | 3 | 6 | 6 | 6 | 6 | 18 | 21 | 20 | 17 | 5 | 3 | 17 | 17 | 17 | 16 | 20 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 932 | 932 | 1024 | 1121 | 1225 | 1175 | 1048 | 975 | 905 | 912 | 1014 | 973 | 899 | 850 | 870 | 808 | 1047 | 1094 | 989 | 890 | 869 | 869 | 909 | 943 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 166 | 168 | 310 | 303 | 168 | 165 | 21 | 21 | 166 | 168 | 166 | 166 | 19 | 165 | 166 | 166 | 174 | 166 | 166 | 21 | 166 | 21 | 21 | 19 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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