Castles Beach surf break

Castles Beach surfForecast / HAW – Oahu / USA

information circle12 Day Weather and Surf, issued 1 am Tuesday 08 Jul 2025 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
26.0° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Castles Beach this week:

The most powerful waves expected at Castles Beach in the next 12 days are 2.3m 8s and forecast to arrive on Tuesday (Jul 08) 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 0.3m 12s period and expected on Monday (Jul 14) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5PM (Tue 8th Jul)7.5ft (2.3m) 8s

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

Updates in  hr  min  s Forecast update imminent
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
2.3
ENE
2.3
ENE
2.1
ENE
1.8
E
1.8
ENE
2
ENE
1.9
ENE
1.7
ENE
1.8
ENE
1.7
ENE
1.6
ENE
1.8
ENE
1.7
ENE
1.6
ENE
2
ENE
1.8
ENE
1.9
ENE
1.9
ENE
1.8
ENE
1.7
ENE
1.9
ENE
1.6
ENE
1.8
ENE
2
ENE
1.7
ENE
1.6
ENE
1.7
ENE
1.5
ENE
1.6
ENE
1.8
ENE
1.7
ENE
1.8
ENE
2
ENE
2
ENE
2.2
ENE
2.2
ENE
Period(s) (?)787777777777788877777888888887777777
Wave
Graph
(?)Metric surfscale
Energy (?)593586478396361416418363347316297336317294433397416453372350417327383463383360386322348329303331399410477528
Wind
(km/h)
35
ENE
35
ENE
35
ENE
30
ENE
35
ENE
30
ENE
35
ENE
30
ENE
35
ENE
30
E
30
ENE
30
E
25
E
30
ENE
30
E
25
E
30
ENE
30
ENE
20
ENE
25
ENE
25
E
30
E
30
ENE
30
ENE
30
ENE
25
ENE
25
E
20
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
35
ENE
30
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onononononononononononononononononononononononononcross-
on
ononononcross-
on
cross-
on
onononon
High Tide
/ height (m)
2:23PM
0.85
12:19AM
0.43
2:56PM
0.88
1:06AM
0.44
3:27PM
0.90
1:50AM
0.45
3:57PM
0.90
2:35AM
0.46
4:26PM
0.89
3:25AM
0.47
4:54PM
0.86
4:21AM
0.47
5:20PM
0.82
5:28AM
0.49
5:45PM
0.76
6:52AM
0.51
6:09PM
0.70
8:40AM
0.56
6:28PM
0.62
10:32AM
0.65
6:29PM
0.56
11:49AM
0.74
Low Tide
/ height (m)
9:34PM
0.40
7:05AM
0.04
9:56PM
0.39
7:42AM
0.02
10:21PM
0.37
8:18AM
0.02
10:48PM
0.36
8:54AM
0.04
11:15PM
0.34
9:30AM
0.09
11:45PM
0.31
10:08AM
0.17
12:16AM
0.27
10:49AM
0.27
12:50AM
0.24
11:41AM
0.38
1:29AM
0.20
1:03PM
0.49
2:16AM
0.16
4:12PM
0.55
3:12AM
0.13
4:13AM
0.10
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunrise5:54--5:54--5:54--5:54--5:56--5:56--5:56--5:56--5:56--5:58--5:58--5:58--
Sunset-7:16--7:16--7:16--7:15--7:15--7:15--7:15--7:15--7:15--7:15--7:15--7:15-
part cloudpart cloudpart cloudclearclearclearrain showersclearclearclearclearclearclearclearclearclearclearclearclearclearthunderstorm clearclearclearclearclearclearclearclearpart cloudclearclearpart cloudclearclearclear
Rain (mm)
------2-------------2---------------
Temp. °C252424242424242524252524252525252525252525252525252525252525262525252525
Feels °C (?)211921212121222322232221242424232323252525242323232223242324232223232323

Short Range Forecast: Light rain (total 2mm), mostly falling on Thu morning. Warm (max 25°C on Tue morning, min 24°C on Tue morning). Mainly strong winds.

Days 3-6 Weather Summary Mostly dry. Warm (max 25°C on Fri morning, min 24°C on Fri morning). Mainly fresh winds.

Days 6-9 Weather Summary Light rain (total 2mm), mostly falling on Mon night. Warm (max 25°C on Mon morning, min 24°C on Mon night). Mainly fresh winds.

Long Range Forecast: Mostly dry. Warm (max 26°C on Fri morning, min 25°C on Thu morning). Mainly fresh winds.

  • 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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Quick surf report for Castles Beach:

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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 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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