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Surf Forecasts:

Castles Beach surf break

Castles Beach surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 am Friday 29 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)

Castles Beach surf forecast from 29 May 2026:

  • Most powerful swell: Tuesday 2 Jun, 5PM (local time) - 2.5ft (0.7m), 19s period, S swell with 347 kJ wave energy.

Best Forecast Surf Conditions for Castles Beach this week:

The most powerful waves expected at Castles Beach in the next 16 days are 0.7m 19s and forecast to arrive on Tuesday (Jun 02) 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 1.0m 11s period and expected on Friday (Jun 05) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5PM (Tue 2nd Jun)2.5ft (0.7m) 19s

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

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

Short Range Forecast

Light rain (total 4mm), mostly falling on Fri morning. Warm (max 24°C on Fri afternoon, min 23°C on Fri morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Mon night. Warm (max 24°C on Mon afternoon, min 23°C on Mon morning). Winds increasing (light winds from the NE on Mon night, fresh winds from the ENE by Wed night).

Friday
29
Saturday
30
Sunday
31
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
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
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
S
20
1.4
ENE
7
1.4
ENE
7
0.5
S
17
1.2
ENE
7
0.4
SSW
16
0.9
NE
7
0.8
ENE
7
0.8
ENE
7
1
ENE
8
1
ENE
8
1.7
ENE
6
1.5
ENE
7
0.7
S
19
1.7
E
7
1.7
E
7
1.7
E
6
1.7
E
7
1.5
E
7
1.7
ENE
7
1.6
E
7
Wave Graph
Metric surfscale
Energy kJ
196
188
197
153
147
82
79
70
68
123
120
220
195
347
266
255
247
255
206
247
240
Wind (km/h)
25
ENE
30
ENE
20
ENE
20
E
20
ENE
15
ENE
10
ENE
15
NE
15
NE
15
ENE
20
NE
15
NE
15
ENE
25
E
25
E
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
E
Wind State
cross-on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
cross-on
on
on
cross-on
on
High Tide
2:23PM0.84m
00:37AM0.47m
2:55PM0.85m
1:06AM0.46m
3:30PM0.85m
1:34AM0.45m
4:05PM0.84m
2:01AM0.44m
4:42PM0.83m
2:27AM0.43m
5:19PM0.81m
2:59AM0.42m
5:56PM0.79m
3:50AM0.40m
Low Tide
9:07PM0.41m
7:14AM0.06m
9:47PM0.40m
7:44AM0.05m
10:26PM0.40m
8:16AM0.05m
11:08PM0.41m
8:48AM0.06m
11:55PM0.41m
9:19AM0.09m
00:49AM0.40m
9:52AM0.12m
1:43AM0.39m
rain showers
clear
part cloud
part cloud
clear
rain showers
clear
clear
clear
clear
clear
rain showers
rain showers
clear
rain showers
clear
clear
part cloud
clear
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:48
—
—
5:48
—
—
5:48
—
—
5:48
—
—
5:48
—
—
5:48
—
—
5:48
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
7:07
—
—
7:07
—
—
7:08
—
—
7:08
—
—
7:08
—
—
7:09
—
—
7:09
—
 mm
1
—
—
—
—
3
—
—
—
—
—
2
1
—
1
—
—
—
—
—
1
Temp °C
23
24
23
23
24
23
23
24
24
23
24
23
24
24
24
23
24
23
24
24
23
Feels °C
21
22
21
22
24
23
24
25
25
23
24
23
26
25
23
19
21
19
22
22
20
Swell 1
Height (m)
Direction
Period (s)
0.6
NNE
10
0.6
NNW
11
0.5
NNE
11
0.5
NNW
10
0.5
NNW
10
0.7
NE
7
0.9
NE
7
0.5
N
11
0.8
ENE
7
0.5
N
10
0.5
N
9
0.5
S
16
0.5
S
16
0.8
NNW
11
0.7
NNW
10
0.6
S
16
0.6
S
16
0.7
N
11
0.9
N
11
0.9
N
11
1
N
11
Energy kJ
78
87
65
57
55
52
79
61
68
49
45
135
132
161
102
190
183
127
198
188
227
Swell 2
Height (m)
Direction
Period (s)
0.6
NNW
12
0.5
N
10
0.5
NNW
11
0.5
S
17
0.5
S
16
0.5
N
10
0.6
E
8
0.5
E
8
0.5
N
10
0.4
SSW
18
0.4
SSW
18
0.4
NNW
9
0.5
N
12
0.7
S
19
0.5
S
18
0.6
NNW
9
0.5
NNW
9
0.5
S
16
0.5
S
15
0.4
SSW
14
0.4
SSW
14
Energy kJ
90
47
66
147
134
48
42
30
53
107
103
27
75
347
158
66
47
126
112
70
68
Swell 3
Height (m)
Direction
Period (s)
0.5
S
20
0.5
S
19
0.5
S
18
0.4
NNE
10
0.4
NNE
10
0.4
SSW
16
0.4
NNW
9
0.4
NNE
8
0.5
E
8
0.3
NNE
7
0.3
SSW
13
0.3
S
21
0.4
SSW
20
0.1
S
9
0.4
SSW
14
0.1
S
8
0.3
N
11
0.4
SE
8
0.1
W
12
0.1
S
9
0.1
NE
11
Energy kJ
196
188
162
32
32
82
28
22
33
10
35
78
127
2
70
1
23
17
3
2
5
Wind waves
Height (m)
Direction
Period (s)
1.4
ENE
7
1.4
ENE
7
1.4
ENE
7
1.2
ENE
7
1.2
ENE
7
0.8
E
8
—
0.8
ENE
7
—
1
ENE
8
1
ENE
8
1.7
ENE
6
1.5
ENE
7
1.4
ENE
7
1.7
E
7
1.7
E
7
1.7
E
6
1.7
E
7
1.5
E
7
1.7
ENE
7
1.6
E
7
Energy kJ
191
181
197
153
147
74
—
70
—
123
120
220
195
163
266
255
247
255
206
247
240
Nearest Offshore or Glassy
Ko Olina Resort
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Halfpoint/Fullpoint
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Ko Olina Resort
HAW - Oahu
Maili Point
HAW - Oahu
Pokai Bay
HAW - Oahu
Sewers (Maili)
HAW - Oahu
Aligator Rock
HAW - Oahu
Pokai Bay
HAW - Oahu
Maili Point
HAW - Oahu
Rating
(10 max)
2
2
3
2
3
2
2
2
3
3
2
3
4
3
3
4
3
2
2
1
3
Distance (km)
41
42
18
41
41
18
18
18
17
18
41
18
41
41
41
45
47
45
42
47
45
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Rating
(10 max)
3
2
3
3
3
2
2
2
3
3
3
4
4
4
4
4
3
3
2
3
3
Best forecast wave conditions in United States
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Magics
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Mouse Rock
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El Capitan
CAL - Santa Barbara
Waiaha Rivermouth / Honls
HAW - Big Island
Ranches
HAW - Oahu
Rincon - Rivermouth
CAL - Ventura
Mouse Rock
CAL - San Luis Obispo
Rating
(10 max)
3
2
4
3
3
4
2
2
4
3
3
4
4
5
4
4
3
3
2
3
4
Header Global
Maraa
French Polynesia
Fare Left
French Polynesia
Fare Left
French Polynesia
Haapiti
French Polynesia
Haapiti
French Polynesia
Haapiti
French Polynesia
Fare Left
French Polynesia
Fare Left
French Polynesia
Ahijedero
Mexico
Blaketown Wedge
New Zealand
Taupo Bay
New Zealand
Abalolo Reef
United States
Ahijedero
Mexico
Hanga Poukura
Chile
Lebu
Chile
Lebu
Chile
Teniente (Lieutenant)
Chile
Los Locos
Spain
Addington (South Beach)
South Africa
Cavalos de Fao
Portugal
Fare Left
French Polynesia
Rating
(10 max)
5
5
5
7
7
6
5
5
4
4
5
4
4
5
5
5
5
5
5
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)
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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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