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Surf Forecasts:
Graters surfForecast / HAW – Oahu / USA
12 Day Weather and Surf, issued 1 am Thursday 18 Sep 2025 HST
Best Forecast Surf Conditions for Graters this week:
The most powerful waves expected at Graters in the next 12 days are 1.9m 7s and forecast to arrive on Saturday (Sep 20) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 7s period and expected on Saturday (Sep 20) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sat 20th Sep) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Graters over the next 12 days.
Short Range Forecast Light rain (total 2mm), mostly falling on Thu night. Warm (max 26°C on Thu morning, min 25°C on Thu morning). Mainly fresh winds. | Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Mon night. Warm (max 26°C on Sun afternoon, min 25°C on Sun morning). Mainly fresh winds. | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 11 | 11 | 10 | 7 | 13 | 13 | 12 | 11 | 10 | 10 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 10 | 7 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 54 | 55 | 56 | 108 | 73 | 211 | 40 | 58 | 67 | 58 | 39 | 35 | 64 | 58 | 52 | 38 | 23 | 21 | 22 | 37 | 127 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | 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 / height (m) | 1:17PM 0.72 | 1:08AM 0.44 | 1:41PM 0.70 | 1:44AM 0.50 | 2:01PM 0.66 | 2:19AM 0.55 | 2:19PM 0.62 | 2:53AM 0.59 | 2:33PM 0.57 | 3:27AM 0.62 | 2:44PM 0.53 | 4:02AM 0.63 | 2:50PM 0.48 | 4:41AM 0.63 | |||||||
Low Tide / height (m) | 8:04PM 0.23 | 6:49AM 0.15 | 8:13PM 0.21 | 7:30AM 0.17 | 8:25PM 0.19 | 8:08AM 0.21 | 8:38PM 0.17 | 8:46AM 0.25 | 8:52PM 0.14 | 9:25AM 0.29 | 9:06PM 0.13 | 10:04AM 0.34 | 9:22PM 0.12 | ||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| Sunrise | 6:18 | - | - | 6:18 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - |
| Sunset | - | 6:31 | - | - | 6:30 | - | - | 6:30 | - | - | 6:29 | - | - | 6:28 | - | - | 6:27 | - | - | 6:25 | - |
 | |  | | |  | | |  | | | | | | |  | | | | | | |
Rain (mm) | - | - | 2 | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - |
| Temp. °C | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 |
| Feels °C (?) | 24 | 25 | 24 | 26 | 26 | 24 | 24 | 25 | 24 | 24 | 25 | 25 | 25 | 26 | 24 | 24 | 25 | 23 | 25 | 25 | 24 |
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Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for HAW - Oahu
Continuing clean conditions at Graters (light winds from the N at Wheeler Air Force Base/oahu Airport 27 km from Graters). 0.6m 8s swell from the N to make surfable waves.
27 km away, 2 h 11 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Graters surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Graters Surf forecast
The above surf forecast table for Graters provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Graters can be found by selecting the local surf guide option on the grey menu. Our Graters surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Graters) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Graters may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Graters is 23 km (14 miles) from Wahiawa. If you plan a vacation in Oahu, look for hotels and other accommodation in Wahiawa. Wahiawa has rooms for a wide range of budgets as well as car hire and transport links.
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