Surf Forecasts:
Castles Beach surf forecast from 9 Nov 2026:
- Best quality surf: No days rated 1★ or higher at Castles Beach in the next 16 days. The closest to surfable is Sunday 22 Nov, 8PM (local time) – 10ft (3.0m), 10s period, E swell with onshore winds.
- Most powerful swell: Sunday 22 Nov, 8PM (local time) - 10ft (3.0m), 10s period, E swell with 1,462 kJ wave energy.
- Next surfable swell (1★+): None forecast at Castles Beach before Wednesday 25 Nov. Conditions stay below 1★ throughout, with swell peaking at 10ft (3.0m), 10s on Sunday 22 Nov.
Best Forecast Surf Conditions for Castles Beach this week:
The most powerful waves expected at Castles Beach in the next 16 days are 3.0m 10s and forecast to arrive on Sunday (Nov 22) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 16s period and expected on Wednesday (Nov 11) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 22nd Nov) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Castles Beach over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Wed night. Warm (max 25°C on Mon morning, min 24°C on Mon night). Mainly strong winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sat afternoon. Warm (max 24°C on Thu morning, min 23°C on Fri morning). Mainly strong winds. | ||||||||||||||||||||
Monday 9 | Tuesday 10 | Wednesday 11 | Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | E 7 | E 7 | E 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | E 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | E 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 557 | 320 | 311 | 218 | 225 | 269 | 432 | 444 | 569 | 693 | 720 | 725 | 644 | 542 | 447 | 365 | 301 | 377 | 621 | 558 | 416 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | on | on | on | on |
High Tide | 1:24PM0.50m | 3:23AM0.86m | 1:45PM0.48m | 3:58AM0.84m | 2:02PM0.46m | 4:36AM0.81m | 2:13PM0.45m | 5:18AM0.78m | 6:05AM0.74m | 6:57AM0.72m | |||||||||||
Low Tide | 9:22AM0.38m | 7:52PM0.05m | 10:03AM0.40m | 8:18PM0.05m | 10:47AM0.41m | 8:46PM0.07m | 11:41AM0.43m | 9:14PM0.10m | 1:21PM0.43m | 9:44PM0.13m | 10:14PM0.18m | 10:49PM0.25m | |||||||||
 | |  | | |  |  | |  | |  | | | | | |  | | | | | |
 | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — |
 | — | 5:51 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:49 | — | — | 5:49 | — | — | 5:49 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 1 | 1 | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
Feels °C | 21 | 22 | 22 | 21 | 22 | 19 | 19 | 19 | 18 | 19 | 19 | 19 | 19 | 20 | 19 | 20 | 20 | 19 | 19 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | NNW 11 | NNW 14 | NNW 13 | NNW 13 | NNW 12 | NNW 12 | NNW 17 | NNW 16 | NNW 15 | NNW 14 | NNW 14 | NW 14 | N 10 | N 10 | NNW 15 | NNW 17 | NNW 16 | NNW 14 | NNW 13 | N 14 | NNW 13 |
| kJ | 280 | 874 | 781 | 578 | 451 | 309 | 1597 | 3499 | 2184 | 1261 | 934 | 363 | 194 | 214 | 377 | 1244 | 783 | 389 | 303 | 1092 | 670 |
Swell 2 Height (m) Direction Period (s) | NNW 15 | NNE 14 | NNE 13 | NNE 11 | NNE 12 | NNE 11 | NNW 12 | S 15 | S 14 | S 13 | S 13 | N 9 | NW 13 | NW 13 | NNW 20 | NNW 13 | NW 12 | N 9 | N 16 | S 14 | N 15 |
| kJ | 181 | 21 | 33 | 25 | 28 | 24 | 274 | 17 | 16 | 14 | 14 | 159 | 193 | 130 | 555 | 313 | 147 | 15 | 427 | 4 | 352 |
Swell 3 Height (m) Direction Period (s) | S 11 | S 14 | N 10 | NNE 13 | S 12 | S 16 | NNE 12 | S 11 | S 11 | S 11 | S 10 | S 13 | S 12 | NNW 17 | N 10 | N 9 | N 9 | S 11 | S 11 | SSW 14 | S 11 |
| kJ | 10 | 16 | 8 | 17 | 11 | 20 | 14 | 9 | 2 | 2 | 2 | 3 | 3 | 113 | 122 | 63 | 41 | 9 | 2 | 20 | 2 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | E 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | E 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | E 7 |
| kJ | 557 | 320 | 311 | 218 | 225 | 269 | 432 | 444 | 569 | 693 | 720 | 725 | 644 | 542 | 447 | 365 | 301 | 377 | 621 | 558 | 416 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 45 | 42 | 41 | 47 | 45 | 123 | 154 | 51 | 49 | 125 | 207 | 125 | 51 | 51 | 45 | 45 | 123 | 145 | 125 | 123 | 47 |
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.
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