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Surf Forecasts:

Castles Beach surf break

Castles Beach surfForecast / HAW – Oahu / USA

information circle12 Day Weather and Surf, issued 1 pm Saturday 24 Jan 2026 HST
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
24.6° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Castles Beach this week:

The surf forecast for Castles Beach over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jan 24) at 11PM. The primary swell is predicted to be 0.7m and 8s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Castles Beach in the next 12 days are 1.7m 8s and forecast to arrive on Monday (Jan 26) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 17s period and expected on Friday (Jan 30) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sat 24th Jan)2.5ft (0.7m) 8s
Best Surf11PM (Sat 24th Jan)2.5ft (0.7m) 8s
Most Powerful 5PM (Mon 26th Jan)5.5ft (1.7m) 8s

Table - best surf conditions forecast for Castles Beach over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Some drizzle, heaviest during Sat afternoon. Warm (max 24°C on Sat afternoon, min 23°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 24°C on Wed afternoon, min 22°C on Wed night). Wind will be generally light.

Sat
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
1
0
0
0
0
0
1
0
0
1
1
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
E
0.7
E
0.6
E
0.5
E
0.5
E
0.7
NNE
1.7
NNE
1.5
NE
1.3
ENE
1.1
ENE
0.9
ENE
0.7
E
0.7
E
0.5
E
0.5
E
0.5
E
0.5
E
0.4
ESE
0.4
SSE
0.5
ENE
0.3
ESE
Period(s) (?)8777768777777777771577
Wave
Graph
(?)Metric surfscale
Energy kJ (?)7453372424343102121581217948502626272818852911
Wind
(km/h)
15
SE
5
W
5
E
10
NE
5
N
15
NE
10
ENE
10
E
15
SE
10
ESE
5
E
5
E
5
N
10
NNW
10
ENE
5
E
5
NNE
10
ENE
10
NE
10
ENE
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		offoncross-
on		crosscross-
on		ononcross-
on		cross-
on		glassglasscrosscross-
off		ononcrosscross-
on		cross-
on		cross-
on		on
High Tide
/ height (m)
7:29PM
0.56
5:40AM
0.64
9:40PM
0.61
5:23AM
0.58
11:29PM
0.70
12:27AM
0.79
1:12AM
0.87
10:50AM
0.41
1:51AM
0.92
12:16PM
0.43
2:26AM
0.95
1:14PM
0.47
Low Tide
/ height (m)
11:59PM
0.46
1:22PM
0.18
2:17AM
0.56
2:21PM
0.15
3:35PM
0.12
4:49PM
0.08
8:57AM
0.40
5:51PM
0.04
9:00AM
0.37
6:44PM
0.01
9:18AM
0.34
Sat
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
Sunrise--7:09--7:09--7:09--7:09--7:09--7:09--7:07
Sunset6:15--6:15--6:15--6:16--6:17--6:17--6:19--
thunderstorm
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
Rain (mm)
1--------------------
Temp. °C242323242423232323232323242423232323232323
Feels °C (?)262525252524232525242526262725242524242424
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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FREE! Surf-Forecast.com widget for your website

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.

View detailed surf forecast for Castles Beach at:
surf-forecast.com

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 12 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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