Castles Beach Surf Break

Lat Long: 21.42° N 157.74° W

Castles Beach Surf Forecast and Surf Report

Issued: 1 pm 28 Oct 2026 (local time)

Forecast update in  hr  min

Today's Castles Beach sea temperature is
26.7°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 29 Oct 2026:

  • Most powerful swell: Monday 2 Nov, 5PM (local time) - 10ft (3.0m), 14s period, NNE swell with 3,859 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 3.0m 14s and forecast to arrive on Monday (Nov 02) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 14s period and expected on Monday (Nov 02) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5PM (Mon 2nd Nov)10ft (3.0m) 14s

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


Short Range Forecast

Heavy rain (total 25mm), heaviest during Wed afternoon. Warm (max 25°C on Thu morning, min 23°C on Wed afternoon). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Sat night. Warm (max 25°C on Sat afternoon, min 23°C on Sun night). Winds increasing (light winds from the ENE on Sat afternoon, strong winds from the NE by Sun night).

Wed
28
Thursday
29
Friday
30
Saturday
31
Sunday
1
Monday
2
Tuesday
3
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
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)
1.1
NNE
12
1.1
NNE
11
1
NNE
11
1
NNE
11
1
NNE
10
1
NNE
10
1.1
NNE
10
1.1
NNE
9
1
NNE
9
1
NNE
9
1.1
NE
8
1.2
NE
8
1.4
NE
5
2.3
NNE
7
2.5
NNE
9
3
NNE
14
2.2
NE
8
2.5
NE
8
2.3
ENE
8
2
ENE
8
Wave Graph
Metric surfscale
Energy kJ
361
280
226
214
208
200
221
199
161
154
173
191
106
584
1044
3859
634
804
649
428
Wind (km/h)
5
ENE
10
ENE
25
ENE
25
ENE
20
ENE
25
ENE
20
NE
15
ENE
20
ENE
15
NE
20
NE
30
NE
35
NNE
35
NE
35
ENE
40
ENE
40
ENE
35
ENE
35
ENE
35
ENE
Wind State
on
on
cross-on
on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
High Tide
2:27PM0.49m
5:13AM0.87m
2:35PM0.46m
6:16AM0.83m
7:29AM0.79m
8:44AM0.76m
8:54PM0.34m
9:47AM0.74m
11:01PM0.44m
10:35AM0.72m
11:56PM0.55m
Low Tide
9:18PM0.01m
12:29PM0.44m
9:56PM0.05m
10:41PM0.12m
11:41PM0.20m
5:33PM0.32m
1:28AM0.29m
5:29PM0.28m
3:35AM0.34m
5:43PM0.23m
mod rain
rain showers
rain showers
rain showers
part cloud
rain showers
part cloud
part cloud
part cloud
part cloud
light rain
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
6:31
—
—
6:33
—
—
6:33
—
—
6:33
—
—
6:33
—
—
6:35
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:57
—
—
5:55
—
—
5:55
—
—
5:54
—
—
5:53
—
—
5:53
—
—
5:52
—
 mm
9
10
3
2
—
1
—
—
—
—
1
—
—
—
—
—
—
—
—
—
Temp °C
24
24
25
25
25
25
25
24
24
25
25
24
24
24
24
24
24
24
24
24
Feels °C
28
28
25
26
25
25
25
24
25
26
26
22
21
19
19
19
19
18
20
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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