Castles Beach surf break

Castles Beach surfForecast / HAW – Oahu / USA

information circle48hr Weather and Surf, issued 1 am Sunday 17 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
25.3° C
(Which is normal for this time of year)

How big are the waves at Castles Beach today?

The current surf forecast for Castles Beach at 6AM is: 1.5m 8s primary swell from a East-northeast direction (forecast issued at 01:00am May 17). An open ocean swell of 0.4m 10s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (HST) & DateWave HeightWave Period
Morning (17 May)4.5ft (1.4m)8s
Afternoon (17 May)4.5ft (1.4m)8s
Evening (17 May)6ft (1.8m)8s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Mon night. Warm (max 25°C on Sun morning, min 23°C on Tue night). Winds increasing (light winds from the E on Sun morning, fresh winds from the ENE by Tue night).

Sunday
17
Monday
18
Tuesday
19
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
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
2
1
1
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
Wave
Height (m)
Direction
Period (s)
1.6
ENE
8
1.5
ENE
8
1.5
ENE
8
1.4
ENE
8
1.4
ENE
8
1.4
ENE
8
1.7
ENE
8
1.8
ENE
8
2.1
ENE
8
2
E
8
1.9
ENE
8
1.8
ENE
8
1.8
ENE
8
1.8
ENE
8
1.7
ENE
8
1.6
ENE
8
1.6
ENE
8
1.5
E
8
1.6
E
8
1.6
E
7
1.6
E
7
1.7
ENE
6
1.9
ENE
7
2
ENE
8
Wave Graph
Metric surfscale
Energy kJ
322
291
291
256
256
256
412
414
533
509
473
437
437
427
383
341
333
279
292
269
285
253
373
472
Wind (km/h)
5
N
10
E
5
E
15
E
15
ENE
20
ENE
25
E
30
E
30
E
25
E
25
E
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
25
E
25
ENE
25
ENE
30
ENE
30
ENE
30
ENE
35
ENE
30
ENE
glassy
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
High Tide
1:32AM0.50m
3:56PM0.96m
2:04AM0.47m
4:46PM0.94m
2:36AM0.44m
5:38PM0.90m
Low Tide
8:11AM-0.05m
10:51PM0.40m
8:51AM-0.04m
00:02AM0.41m
9:32AM0.01m
rain showers
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
part cloud
part cloud
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:02
7:02
1
1
Temp °C
24
24
24
25
25
25
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
23
27
26
27
26
26
25
24
23
23
23
23
22
22
23
23
23
23
23
23
22
22
22
21
20
Swell 1
Height (m)
Direction
Period (s)
1.6
ENE
8
1.5
ENE
8
1.5
ENE
8
1.4
ENE
8
1.4
ENE
8
1.4
ENE
8
1.5
ENE
8
0.4
NW
10
0.3
NNW
9
0.3
NNW
9
0.2
SSW
14
0.2
SSW
14
0.3
SSW
15
0.3
SSW
16
0.3
NW
12
0.4
NW
12
0.3
NW
11
0.4
NW
11
0.4
NW
11
0.4
NNW
12
0.4
NNW
12
0.4
NNW
11
0.4
NNW
11
0.4
NNW
11
Energy kJ
322
291
291
256
256
256
299
23
17
16
20
20
43
48
23
36
19
31
31
54
54
47
46
47
Swell 2
Height (m)
Direction
Period (s)
0.4
NNW
10
0.4
NNW
10
0.4
NNW
10
0.4
NNW
10
0.4
NNW
10
0.4
NNW
10
0.4
NW
10
0.3
SSW
15
0.2
SSW
15
0.2
SSW
14
0.2
NNW
9
0.2
NNW
13
0.2
NNW
13
0.2
NNW
12
0.2
SSW
14
0.2
SSW
14
0.2
SSW
14
0.2
SSW
14
0.2
SSW
14
0.3
SSW
14
0.2
SSW
14
0.3
SSW
17
0.3
SSW
15
0.3
SSW
15
Energy kJ
42
42
42
41
39
38
24
43
21
20
8
18
17
15
18
18
18
18
19
40
20
59
42
44
Swell 3
Height (m)
Direction
Period (s)
0.3
SSE
9
0.4
SSE
7
0.4
SSE
7
0.3
SSE
6
0.3
SSE
6
0.3
SSE
7
0.3
SSE
7
0.2
NNW
16
0.2
NNW
15
0.2
NNW
15
0.2
NNW
14
0.2
NNW
9
0.2
SSW
19
0.2
NNW
9
0.2
SSW
19
0.2
SSE
6
0.2
NNW
13
0.2
SSW
17
0.2
SSW
18
0.2
SSW
18
0.2
SSE
10
0.1
SE
10
0.2
NNW
13
0.2
N
13
Energy kJ
16
20
18
8
7
10
10
25
22
21
20
8
37
8
37
4
17
28
30
30
10
4
18
14
Wind waves
Height (m)
Direction
Period (s)
1.7
ENE
8
1.8
ENE
8
2.1
ENE
8
2
E
8
1.9
ENE
8
1.8
ENE
8
1.8
ENE
8
1.8
ENE
8
1.7
ENE
8
1.6
ENE
8
1.6
ENE
8
1.5
E
8
1.6
E
8
1.6
E
7
1.6
E
7
1.7
ENE
6
1.9
ENE
7
2
ENE
8
Energy kJ
412
414
533
509
473
437
437
427
383
341
333
279
292
269
285
253
373
472
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
2
2
2
2
2
1
1
1
2
2
2
1
1
1
2
2
2
1
2
2
2
Distance (km)
0
18
18
18
19
41
19
41
41
41
41
41
41
41
41
41
41
41
41
41
42
45
45
45
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
2
2
2
2
2
1
1
1
2
2
2
2
1
1
2
3
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
2
2
2
4
5
5
5
4
5
4
4
3
4
4
4
4
4
3
3
3
4
4
5
Header Global
Rating
(10 max)
4
8
6
4
4
5
6
5
4
5
4
5
4
4
4
4
4
4
4
4
4
4
4
4
  • 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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