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Surf Forecasts:
Graters surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 am Thursday 21 May 2026 HSTForecast update in hr min s Forecast update imminent
Graters surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Graters sea temperature is
25.4° C
(Which is normal for this time of year)How big are the waves at Graters today?
The current surf forecast for Graters at 8AM is: 0.4m 10s primary swell from a North-northwest direction (forecast issued at 01:00am May 21). An open ocean swell of 0.2m 13s is not directed at the surf break, a second open ocean swell of 3.0m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 1.5ft (0.4m) | 10s |
| Afternoon (21 May) | 1.5ft (0.4m) | 10s |
| Evening (21 May) | 1.5ft (0.4m) | 10s |
Table - waves today at Graters. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Sat morning. Warm (max 24°C on Thu afternoon, min 22°C on Fri night). Mainly strong winds. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||||||||||||
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 | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
NNW 10 | NNW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NNW 10 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 17 | NNW 16 | NNW 16 | NNW 15 | NW 14 | NW 14 | |
41 | 39 | 37 | 24 | 24 | 24 | 23 | 23 | 25 | 25 | 25 | 40 | 56 | 57 | 57 | 57 | 56 | 53 | 74 | 102 | 162 | 191 | 211 | 191 | |
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 | 7:41PM0.72m | 7:30AM0.27m | 8:31PM0.66m | 10:39AM0.34m | 9:15PM0.61m | |||||||||||||||||||
Low Tide | 10:48AM0.14m | 4:50AM0.26m | 11:43AM0.23m | 4:46AM0.23m | 1:28PM0.33m | |||||||||||||||||||
 | |  | |  | | | | | | | | | | | |  | | |  | | | | | |
 | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:07 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | |
Temp °C | 23 | 23 | 23 | 23 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 23 | 23 | 23 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
19 | 18 | 18 | 18 | 19 | 18 | 18 | 17 | 18 | 17 | 19 | 18 | 19 | 18 | 19 | 18 | 17 | 19 | 19 | 17 | 18 | 17 | 17 | 18 | |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 | 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 |
 kJ | 41 | 39 | 37 | 24 | 24 | 24 | 23 | 23 | 25 | 25 | 25 | 40 | 56 | 57 | 57 | 57 | 56 | 53 | 51 | 102 | 162 | 191 | 211 | 191 |
Swell 2 Height (m) Direction Period (s) | NW 9 | WNW 9 | SSW 13 | SSW 14 | SSW 14 | S 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | S 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | NNW 19 | NNW 18 | NW 17 | NW 10 | NW 10 | NNW 10 | NW 10 | NW 10 |
| kJ | 12 | 8 | 17 | 20 | 20 | 5 | 22 | 21 | 21 | 21 | 17 | 21 | 20 | 18 | 18 | 18 | 35 | 31 | 74 | 50 | 50 | 39 | 25 | 24 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 13 | S 16 | S 16 | S 16 | SW 12 | SW 14 | S 13 | 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 13 | S 16 | S 15 | S 15 |
| kJ | 16 | 16 | 20 | 20 | 5 | 6 | 8 | 3 | 3 | 3 | 3 | 3 | 6 | 6 | 6 | 6 | 18 | 21 | 20 | 17 | 3 | 19 | 17 | 17 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | 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 9 | ENE 8 | ENE 8 |
| kJ | 871 | 939 | 1033 | 979 | 1003 | 1024 | 1147 | 1147 | 1098 | 1048 | 975 | 980 | 891 | 1014 | 964 | 870 | 913 | 837 | 837 | 1082 | 1094 | 1012 | 925 | 925 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 163 | 163 | 163 | 182 | 163 | 164 | 303 | 164 | 161 | 35 | 35 | 174 | 176 | 174 | 174 | 174 | 35 | 163 | 174 | 182 | 174 | 163 | 35 | 161 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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