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Surf Forecasts:

Castles Beach surfForecast / HAW – Oahu / USA
Forecast update in hr min s Forecast update imminent
Castles Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castles Beach sea temperature is
25.1° C
(Which is slightly warmer than usual)Best Forecast Surf Conditions for Castles Beach this week:
The most powerful waves expected at Castles Beach in the next 16 days are 2.4m 7s and forecast to arrive on Saturday (May 02) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 12s period and expected on Thursday (Apr 30) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sat 2nd May) | 8ft (2.4m) 7s |
Table - best surf conditions forecast for Castles Beach over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 3mm), mostly falling on Fri night. Warm (max 24°C on Sat afternoon, min 23°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Mon night. Warm (max 24°C on Thu afternoon, min 22°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Fri 1 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | |
364 | 361 | 253 | 241 | 191 | 216 | 215 | 173 | 214 | 212 | 141 | 220 | 261 | 187 | 188 | 175 | 129 | 279 | 376 | 376 | 456 | |
Wind (km/h) | |||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | on | on | on | on | on | on | cross-on | on | on | cross-on | on | on | cross-on | |
High Tide | 10:30PM0.74m | 11:27AM0.44m | 11:13PM0.72m | 12:17PM0.54m | 11:47PM0.70m | 12:55PM0.63m | 00:15AM0.66m | 1:29PM0.71m | 00:39AM0.62m | 2:01PM0.77m | 1:02AM0.59m | 2:32PM0.82m | 1:23AM0.55m | 3:03PM0.84m | |||||||
Low Tide | 6:06AM0.28m | 4:13PM0.32m | 6:16AM0.24m | 5:31PM0.33m | 6:31AM0.19m | 6:30PM0.34m | 6:48AM0.15m | 7:20PM0.35m | 7:06AM0.12m | 8:06PM0.36m | 7:25AM0.09m | 8:48PM0.37m | 7:46AM0.07m | ||||||||
— | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | |
6:52 | — | 6:52 | — | — | 6:53 | — | — | 6:53 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:55 | |
1 | — | — | 2 | — | — | — | — | — | 4 | — | — | — | — | — | — | — | 1 | 1 | — | — | |
Temp °C | 23 | 23 | 24 | 23 | 23 | 24 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 23 | 24 | 24 |
20 | 20 | 23 | 22 | 22 | 24 | 22 | 24 | 23 | 22 | 21 | 21 | 20 | 21 | 20 | 20 | 21 | 22 | 20 | 21 | 21 | |
Swell 1 Height (m) Direction Period (s) | NNW 12 | NW 13 | NW 13 | NW 12 | NE 8 | NW 12 | NW 11 | NNW 11 | NNW 10 | NNW 10 | NW 10 | NW 14 | NW 13 | NW 14 | NW 14 | NNW 13 | NNW 12 | NNW 13 | NNW 12 | NNW 12 | NNW 11 |
56 | 183 | 175 | 149 | 191 | 135 | 123 | 78 | 73 | 42 | 27 | 46 | 79 | 214 | 189 | 202 | 190 | 261 | 237 | 177 | 109 | |
Swell 2 Height (m) Direction Period (s) | NW 15 | SSW 15 | NNE 8 | SSW 15 | NW 12 | SSW 14 | E 8 | NE 9 | NE 9 | NNE 10 | NE 8 | NW 10 | NNW 16 | NNE 10 | NE 9 | NE 9 | NE 8 | S 16 | S 16 | S 15 | NW 16 |
55 | 23 | 24 | 22 | 149 | 21 | 5 | 22 | 21 | 9 | 17 | 25 | 25 | 9 | 14 | 13 | 34 | 20 | 19 | 17 | 129 | |
Swell 3 Height (m) Direction Period (s) | NW 12 | S 12 | SSW 16 | S 9 | SSW 15 | ESE 8 | SSW 14 | SSW 13 | SW 13 | NE 8 | NW 15 | SW 12 | NNE 10 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | S 9 | NNW 18 | S 16 |
5 | 3 | 24 | 2 | 21 | 6 | 19 | 17 | 7 | 3 | 33 | 6 | 9 | 5 | 4 | 4 | 4 | 4 | 2 | 31 | 19 | |
Wind waves Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | NE 8 | — | NE 8 | NE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
364 | 361 | 253 | 241 | — | 216 | 215 | 173 | 214 | 212 | 141 | 220 | 261 | 187 | 188 | 175 | 129 | 279 | 376 | 376 | 456 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 41 | 41 | 41 | 18 | 41 | 41 | 18 | 41 | 41 | 41 | 41 | 42 | 41 | 41 | 47 | 41 | 41 | 45 | 45 | 45 | 42 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Castles Beach Surf forecast
The above surf forecast table for Castles Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castles Beach can be found by selecting the local surf guide option on the grey menu. Our Castles Beach 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 (Castles Beach) 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 Castles Beach 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.
Castles is 2 km (1 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.












