Castles Beach surf break

Castles Beach surfForecast / HAW – Oahu / USA

information circle48hr Weather and Surf, issued 1 pm Sunday 31 May 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
25.0° C
(Which is slightly cooler than normal)

How big are the waves at Castles Beach today (31 May):

  • Morning surf: Morning surf (31 May, local time) - 4ft (1.2m), 8s period with ENE swell.
  • Afternoon surf: Afternoon surf (31 May, local time) - 3.5ft (1.0m), 7s period with ENE swell.
  • Evening surf: Evening surf (31 May, local time) - 3ft (0.9m), 7s period with ENE swell.

The current surf forecast for Castles Beach at 7PM is: 0.9m 7s primary swell from a East-northeast direction and 0.5m 8s secondary swell from a East direction (forecast issued at 01:00pm May 31). An open ocean swell of 0.5m 11s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (HST) & DateWave HeightWave Period
Morning (31 May)4ft (1.2m)8s
Afternoon (31 May)3.5ft (1.0m)7s
Evening (31 May)3ft (0.9m)7s

Table - waves today at Castles Beach. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 12mm), heaviest on Sun night. Warm (max 24°C on Sun afternoon, min 23°C on Sun night). Mainly fresh winds.

Sun
31
Monday
1
Tuesday
2
Wed
3
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
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
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.9
NE
7
1
ENE
7
0.9
ENE
7
0.9
ENE
7
0.9
ENE
7
0.9
ENE
7
1.1
ENE
8
1.2
ENE
8
1.1
E
8
0.5
S
18
1.1
ENE
7
1.1
ENE
7
0.5
S
17
0.5
S
16
0.4
SSW
20
0.5
S
20
1.4
ENE
6
1.4
ENE
6
0.7
S
19
0.7
S
18
0.6
S
18
0.5
S
18
1.6
E
6
1.7
E
7
Wave Graph
Metric surfscale
Energy kJ
75
117
86
86
84
84
147
173
153
160
140
136
146
135
128
194
132
129
347
307
225
165
213
250
Wind (km/h)
15
ENE
20
ENE
20
ENE
20
ENE
15
ENE
20
NE
20
ENE
20
ENE
20
ENE
20
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
E
25
E
25
E
30
E
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
cross-on
on
on
on
on
on
on
High Tide
3:30PM0.85m
1:34AM0.45m
4:05PM0.84m
2:01AM0.44m
4:42PM0.83m
2:27AM0.43m
Low Tide
10:26PM0.40m
8:16AM0.05m
11:08PM0.41m
8:48AM0.06m
11:55PM0.41m
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
rain showers
rain showers
part cloud
clear
rain showers
rain showers
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:48
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:08
7:08
7:08
7:09
1
2
1
1
2
2
1
1
1
Temp °C
24
24
24
24
23
23
23
23
24
24
24
23
24
23
23
24
24
24
24
24
24
24
24
24
25
24
24
25
24
23
23
22
24
24
23
22
24
22
22
24
23
23
24
24
24
24
23
23
Swell 1
Height (m)
Direction
Period (s)
0.7
ESE
8
0.5
N
9
0.6
E
8
0.5
E
8
0.5
E
8
0.6
E
8
0.5
N
10
0.5
N
10
0.5
N
10
0.5
S
18
0.5
N
9
0.5
N
9
0.5
E
8
0.5
S
16
0.4
SSW
20
0.5
S
16
0.5
S
16
0.6
N
12
0.8
NNW
11
0.8
NNW
11
0.8
NNW
10
0.7
NNW
10
0.7
NNW
10
0.6
NNW
10
Energy kJ
62
43
42
30
31
45
50
50
49
160
45
42
33
135
128
131
132
103
164
158
144
104
102
72
Swell 2
Height (m)
Direction
Period (s)
0.4
NNW
9
0.5
N
8
0.5
N
11
0.5
N
11
0.5
N
11
0.5
N
10
0.4
SSW
14
0.4
SSW
18
0.5
NE
7
0.5
N
10
0.4
SSW
18
0.4
SSW
17
0.5
N
9
0.4
NNW
9
0.4
NNW
9
0.5
S
20
0.5
N
12
0.5
S
16
0.7
S
19
0.7
S
18
0.6
S
18
0.5
S
18
0.5
S
17
0.6
S
17
Energy kJ
28
33
61
61
59
53
68
114
25
48
103
101
41
27
26
194
76
129
347
307
225
158
154
212
Swell 3
Height (m)
Direction
Period (s)
0.4
N
8
0.4
SSW
15
0.4
NNE
8
0.4
N
8
0.4
NNE
8
0.4
SSW
14
0.4
NNE
8
0.3
SSW
14
0.4
SSW
18
0.3
N
7
0.3
SSW
13
0.3
S
21
0.5
S
17
0.4
ESE
8
0.4
SSW
16
0.4
NNW
9
0.4
SSW
20
0.4
SSW
19
0.1
S
9
0.1
S
9
0.4
SSW
14
0.4
SSW
14
0.4
SSW
14
Energy kJ
20
72
22
18
19
69
19
40
107
10
35
80
146
20
86
26
127
125
2
2
69
70
69
Wind waves
Height (m)
Direction
Period (s)
0.9
NE
7
1
ENE
7
0.9
ENE
7
0.9
ENE
7
0.9
ENE
7
0.9
ENE
7
1.1
ENE
8
1.2
ENE
8
1.1
E
8
1.1
E
7
1.1
ENE
7
1.1
ENE
7
1.1
ENE
5
1.2
ENE
6
1.1
ENE
6
1.3
ENE
6
1.4
ENE
6
1.4
ENE
6
1.6
ENE
6
1.7
ENE
6
1.5
ENE
6
1.5
ENE
6
1.6
E
6
1.7
E
7
Energy kJ
75
117
86
86
84
84
147
173
153
134
140
136
66
84
83
102
114
118
165
205
167
165
213
250
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
4
4
3
4
4
3
4
3
1
Distance (km)
18
18
18
18
18
18
18
18
18
18
18
18
18
19
18
18
41
41
41
41
41
19
41
45
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
1
Best forecast wave conditions in United States
Rating
(10 max)
2
3
4
5
4
4
4
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Header Global
Rating
(10 max)
5
5
5
5
5
5
8
5
5
9
5
4
4
4
5
5
5
5
5
5
5
4
5
5
  • 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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