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Surf Forecasts:
Graters surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 am Monday 18 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
25.1° C
(Which is normal for this time of year)How big are the waves at Graters today?
The current surf forecast for Graters at 5AM is: 0.4m 15s primary swell from a Northwest direction and 0.4m 9s secondary swell from a Northwest direction (forecast issued at 01:00am May 18). An open ocean swell of 0.4m 14s is not directed at the surf break, a second open ocean swell of 2.1m 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 (18 May) | 1.5ft (0.4m) | 14s |
| Afternoon (18 May) | 1.5ft (0.4m) | 13s |
| Evening (18 May) | 1.5ft (0.4m) | 12s |
Table - waves today at Graters. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 24°C on Mon morning, min 23°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
NW 15 | NW 15 | NW 14 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NNW 11 | NW 11 | NNW 11 | NW 10 | NW 11 | NW 11 | NW 10 | NW 10 | NNW 10 | NW 10 | NNW 11 | NNW 10 | NNW 11 | NNW 10 | |
56 | 54 | 49 | 45 | 42 | 38 | 37 | 67 | 43 | 59 | 82 | 104 | 82 | 89 | 92 | 115 | 108 | 104 | 67 | 47 | 90 | 97 | 75 | 63 | |
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 | 1:19AM0.36m | 4:58PM0.84m | 5:51PM0.81m | 6:46PM0.77m | ||||||||||||||||||||
Low Tide | 11:58PM0.35m | 8:41AM-0.04m | 9:21AM-0.00m | 10:03AM0.06m | ||||||||||||||||||||
 | |  |  | | |  | | | | | | | | | | | | | | | | | | |
 | — | 5:52 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:05 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 |
21 | 21 | 23 | 22 | 22 | 22 | 23 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 21 | 21 | 21 | 20 | 21 | 21 | 20 | 20 | 19 | |
Swell 1 Height (m) Direction Period (s) | NNW 9 | SW 14 | SW 14 | SW 14 | SW 14 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NNW 11 | NW 11 | NNW 11 | NW 10 | NW 11 | NW 11 | NW 10 | NW 10 | NNW 10 | NW 10 | NNW 11 | NNW 10 | NNW 11 | NNW 10 |
 kJ | 32 | 51 | 50 | 50 | 50 | 38 | 37 | 67 | 43 | 59 | 82 | 104 | 82 | 89 | 92 | 115 | 108 | 104 | 67 | 47 | 90 | 97 | 75 | 63 |
Swell 2 Height (m) Direction Period (s) | SW 14 | NW 9 | NW 9 | NW 13 | NW 13 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 18 | SSW 18 | SW 14 | SSW 16 | SSW 15 | SSW 15 | SW 16 | SW 16 | NNW 11 | SSW 16 | SSW 16 | SSW 15 | NW 9 |
| kJ | 51 | 21 | 21 | 45 | 42 | 49 | 48 | 47 | 46 | 47 | 48 | 79 | 30 | 46 | 24 | 21 | 44 | 64 | 64 | 43 | 50 | 50 | 21 | 13 |
Swell 3 Height (m) Direction Period (s) | NW 15 | NW 15 | NW 14 | SW 19 | SW 19 | SSW 19 | NNW 8 | NNW 8 | NNW 13 | SSW 18 | SW 18 | SW 13 | SW 13 | NNW 14 | SSW 13 | NNW 13 | SW 16 | SW 13 | NNW 12 | SSW 16 | NW 10 | SW 13 | SSW 13 | SSW 14 |
| kJ | 56 | 54 | 49 | 96 | 96 | 37 | 7 | 7 | 17 | 30 | 79 | 28 | 27 | 18 | 17 | 17 | 10 | 7 | 28 | 50 | 14 | 7 | 17 | 20 |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 526 | 558 | 507 | 476 | 476 | 428 | 383 | 333 | 301 | 287 | 287 | 326 | 287 | 333 | 365 | 374 | 392 | 402 | 535 | 596 | 713 | 748 | 719 | 782 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 11 | 10 | 10 | 32 | 32 | 32 | 32 | 11 | 11 | 11 | 11 | 11 | 13 | 11 | 13 | 13 | 13 | 32 | 32 | 32 | 32 | 35 | 35 | 35 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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