Castles Beach surf break

Castles Beach surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 am Thursday 30 Apr 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
24.9° 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 16 days are 2.1m 8s and forecast to arrive on Friday (May 01) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 15s period and expected on Saturday (May 02) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Fri 1st May)7ft (2.1m) 8s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 23°C on Thu morning, min 22°C on Fri night). Mainly fresh winds.

Days 4-6 Weather Summary

Some drizzle, heaviest during Tue night. Warm (max 23°C on Sun morning, min 23°C on Sun morning). Mainly fresh winds.

Thursday
30
Friday
1
Saturday
2
Sunday
3
Monday
4
Tuesday
5
Wednesday
6
AM
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
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
1.7
ENE
7
1.7
ENE
7
2
ENE
7
2.1
ENE
8
1.9
ENE
8
1.9
ENE
8
1.9
ENE
8
1.6
ENE
8
1.6
ENE
8
1.6
ENE
8
1.5
ENE
8
1.7
ENE
7
1.6
ENE
7
1.6
ENE
7
1.3
ENE
7
0.9
ESE
8
0.9
E
8
0.9
E
8
0.9
E
8
0.9
E
8
0.5
E
8
Wave Graph
Metric surfscale
Energy kJ
277
248
361
487
389
411
397
276
298
298
270
302
261
223
177
115
107
99
94
97
34
Wind (km/h)
30
ENE
30
ENE
40
ENE
35
ENE
35
ENE
30
ENE
30
ENE
25
ENE
25
ENE
25
ENE
30
NE
30
ENE
25
ENE
25
ENE
25
ENE
20
ENE
20
ENE
15
ENE
20
ENE
20
ENE
25
E
on
cross-on
on
on
on
on
on
cross-on
cross-on
on
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
on
on
cross-on
on
High Tide
2:32PM0.82m
1:23AM0.55m
3:03PM0.84m
1:43AM0.52m
3:36PM0.84m
2:01AM0.49m
4:11PM0.82m
2:15AM0.47m
4:51PM0.79m
2:19AM0.45m
5:36PM0.76m
6:28PM0.73m
Low Tide
8:48PM0.37m
7:46AM0.07m
9:28PM0.38m
8:09AM0.06m
10:10PM0.40m
8:34AM0.07m
10:55PM0.42m
9:01AM0.08m
11:53PM0.44m
9:29AM0.10m
9:59AM0.13m
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
rain showers
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:00
6:00
5:58
5:58
5:58
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:55
6:55
6:57
6:57
6:57
6:58
1
Temp °C
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
19
20
20
19
19
20
20
20
21
21
21
20
22
21
21
22
22
22
22
22
21
Swell 1
Height (m)
Direction
Period (s)
0.8
NNW
12
0.8
NNW
12
0.9
NNW
13
0.9
NNW
12
0.8
NNW
12
0.9
NW
17
1
NW
15
0.9
NW
14
0.8
NW
13
0.6
NW
12
0.6
NW
12
0.6
NW
11
0.4
NW
11
0.6
NW
13
0.9
NW
12
0.9
ENE
6
0.8
NNW
11
0.9
E
8
0.6
NNW
10
0.6
NNW
10
0.6
NNW
10
Energy kJ
184
190
261
226
156
424
429
288
205
118
114
75
40
103
205
53
154
99
68
67
67
Swell 2
Height (m)
Direction
Period (s)
0.1
S
17
0.4
NNW
8
0.2
S
16
0.3
S
15
0.5
NW
18
0.7
NNW
12
0.3
S
14
0.2
S
14
0.3
S
13
0.3
S
13
0.3
SSW
14
0.3
SSW
14
0.4
NW
13
0.4
NW
10
0.2
S
13
0.8
NNW
12
0.4
ENE
7
0.6
NW
11
0.4
N
7
0.4
N
6
0.5
E
8
Energy kJ
5
19
19
38
157
121
36
16
31
31
41
41
46
24
13
171
19
94
14
12
34
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
10
0.2
S
16
0.1
S
12
0.1
NW
20
0.3
S
16
0.2
S
13
0.2
S
18
0.2
S
18
0.2
SSW
16
0.1
S
16
0.1
S
10
0.1
SW
20
0.2
S
13
0.2
SSW
13
0.1
SW
18
0.5
E
8
0.1
S
12
0.4
N
7
0.1
NE
9
0.2
ENE
8
0.3
N
6
Energy kJ
4
20
3
15
43
14
24
24
25
5
2
15
14
17
12
34
3
16
3
7
7
Wind waves
Height (m)
Direction
Period (s)
1.7
ENE
7
1.7
ENE
7
2
ENE
7
2.1
ENE
8
1.9
ENE
8
1.9
ENE
8
1.9
ENE
8
1.6
ENE
8
1.6
ENE
8
1.6
ENE
8
1.5
ENE
8
1.7
ENE
7
1.6
ENE
7
1.6
ENE
7
1.3
ENE
7
0.9
ESE
8
0.9
E
8
0.9
E
8
0.9
E
8
0.7
E
4
Energy kJ
277
248
361
487
389
411
397
276
298
298
270
302
261
223
177
115
107
94
97
19
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
2
3
2
3
3
2
2
1
2
1
2
2
1
2
1
1
1
1
Distance (km)
45
47
47
51
45
41
41
42
41
41
123
41
41
41
41
19
41
18
18
18
41
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
3
3
3
3
3
2
2
2
2
2
2
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
2
3
2
3
3
3
3
4
2
2
3
2
2
3
2
2
2
2
2
2
Header Global
Rating
(10 max)
6
7
6
5
7
4
4
5
4
4
5
5
4
5
4
5
5
6
6
8
9
  • 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 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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