Castles Beach Surf Break

Lat Long: 21.42° N 157.74° W

Castles Beach Surf Forecast and Surf Report

Issued: 1 pm 09 Jul 2026 (local time)

Forecast update in  hr  min

Today's Castles Beach sea temperature is
26.1° C
0.1° 

Castles Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Castles Beach surf forecast from 10 Jul 2026:

  • Most powerful swell: Sunday 12 Jul, 2PM (local time) - 8ft (2.4m), 8s period, ENE swell with 661 kJ wave energy.

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 8s and forecast to arrive on Sunday (Jul 12) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 18s period and expected on Sunday (Jul 12) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Sun 12th Jul)8ft (2.4m) 8s

Table - best surf conditions forecast for Castles Beach over the next 16 days.


Short Range Forecast

Some drizzle, heaviest during Sun morning. Warm (max 25°C on Thu afternoon, min 24°C on Thu afternoon). Mainly fresh winds.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Sun afternoon. Warm (max 25°C on Sun afternoon, min 24°C on Sun afternoon). Mainly fresh winds.

Thu
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
ENE
7
2.2
ENE
7
1.9
ENE
7
1.7
ENE
7
2.1
ENE
7
2
ENE
7
2
ENE
7
1.9
ENE
7
2.4
ENE
7
2.3
ENE
8
2
ENE
8
1.8
ENE
8
1.8
ENE
7
1.7
ENE
7
1.6
NE
8
1.7
ENE
8
1.7
ENE
7
1.5
ENE
7
1.7
ENE
7
2
ENE
7
1.7
ENE
7
Wave Graph
Metric surfscale
Energy kJ
482
498
376
293
408
400
389
366
590
629
496
362
344
310
283
314
310
228
294
352
277
Wind (km/h)
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
25
ENE
25
ENE
25
ENE
25
E
25
ENE
25
ENE
25
ENE
25
ENE
Wind State
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
cross-on
cross-on
on
on
cross-on
on
on
on
on
on
High Tide
12:47PM0.83m
9:36PM0.45m
1:33PM0.91m
11:18PM0.44m
2:16PM0.96m
00:30AM0.44m
2:56PM0.98m
1:30AM0.45m
3:34PM0.98m
2:26AM0.47m
4:09PM0.95m
3:20AM0.49m
Low Tide
4:28AM0.08m
8:34PM0.45m
5:24AM0.03m
8:53PM0.41m
6:18AM-0.01m
9:22PM0.38m
7:09AM-0.04m
9:53PM0.36m
7:56AM-0.04m
10:25PM0.34m
8:40AM-0.00m
10:56PM0.31m
9:22AM0.06m
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rain showers
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:54
5:56
5:56
5:56
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:16
7:16
7:15
7:15
7:15
7:15
7:15
7:15
 mm
1
1
1
Temp °C
25
24
24
24
24
24
25
24
24
25
24
24
24
24
25
25
25
25
25
25
25
Feels °C
24
21
22
21
22
22
23
22
22
22
21
21
22
22
23
24
24
24
24
24
25
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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Quick surf report for Castles Beach:

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castles Beach 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 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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