Castles Beach Surf Break

Lat Long: 21.42° N 157.74° W

Castles Beach Surf Forecast and Surf Report

Issued: 1 pm 02 Nov 2026 (local time)

Forecast update in  hr  min

Today's Castles Beach sea temperature is
26.4°C
0.0° 

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 2 Nov 2026:

  • Best quality surf: No days rated 1★ or higher at Castles Beach in the next 16 days. The closest to surfable is Saturday 7 Nov, 2AM (local time) – 7.5ft (2.3m), 10s period, ENE swell with cross-onshore winds.
  • Most powerful swell: Saturday 7 Nov, 2AM (local time) - 7.5ft (2.3m), 10s period, ENE swell with 979 kJ wave energy.
  • Next surfable swell (1★+): None forecast at Castles Beach before Wednesday 18 Nov. Conditions stay below 1★ throughout, with swell peaking at 7.5ft (2.3m), 10s on Saturday 7 Nov.

Best Forecast Surf Conditions for Castles Beach this week:

The most powerful waves expected at Castles Beach in the next 16 days are 2.3m 10s and forecast to arrive on Saturday (Nov 07) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 17s period and expected on Wednesday (Nov 11) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sat 7th Nov)7.5ft (2.3m) 10s

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


Short Range Forecast

Light rain (total 9mm), mostly falling on Mon night. Warm (max 25°C on Mon afternoon, min 24°C on Mon night). Mainly strong winds.

Days 5-7 Weather Summary

Light rain (total 9mm), mostly falling on Thu afternoon. Warm (max 25°C on Thu afternoon, min 24°C on Thu afternoon). Mainly strong winds.

Mon
2
Tuesday
3
Wednesday
4
Thursday
5
Friday
6
Saturday
7
Sunday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
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
Wave
Height (m)
Direction
Period (s)
2.4
NE
8
2.2
NE
8
2.1
NE
8
2.1
NE
8
2.2
NE
8
2.4
ENE
8
2.1
ENE
8
2
ENE
7
2.1
ENE
7
2.4
ENE
8
2.2
ENE
8
2
E
8
2.2
E
7
2.3
ENE
10
2.1
ENE
7
2.1
ENE
7
1.8
ENE
7
1.5
E
9
2
ENE
7
2.1
ENE
7
Wave Graph
Metric surfscale
Energy kJ
672
594
494
494
530
663
468
394
443
637
650
562
515
979
385
413
290
335
349
418
Wind (km/h)
40
ENE
35
ENE
35
ENE
35
ENE
35
ENE
40
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
NE
40
NE
40
ENE
40
ENE
35
ENE
35
ENE
35
ENE
40
ENE
Wind State
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
11:01PM0.44m
10:35AM0.72m
11:56PM0.55m
11:13AM0.68m
00:37AM0.65m
11:44AM0.65m
1:13AM0.73m
12:12PM0.61m
1:46AM0.80m
12:38PM0.57m
2:18AM0.85m
1:02PM0.53m
2:50AM0.86m
Low Tide
5:29PM0.28m
3:35AM0.34m
5:43PM0.23m
5:05AM0.36m
6:01PM0.18m
6:13AM0.37m
6:21PM0.13m
7:08AM0.37m
6:41PM0.10m
7:56AM0.37m
7:03PM0.07m
8:40AM0.38m
7:27PM0.05m
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
clear
part cloud
rain showers
rain showers
rain showers
rain showers
part cloud
rain showers
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
6:35
—
—
6:35
—
—
6:35
—
—
6:35
—
—
6:37
—
—
6:37
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:53
—
—
5:52
—
—
5:52
—
—
5:52
—
—
5:52
—
—
5:51
—
—
5:51
—
 mm
—
1
2
2
2
1
—
—
1
2
4
1
—
2
—
—
—
—
—
—
Temp °C
25
25
24
24
24
24
25
25
25
25
24
25
25
24
24
25
24
24
25
24
Feels °C
20
20
20
20
20
20
22
22
22
23
20
22
22
20
19
21
20
20
22
20
  • 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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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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