Castles Beach Surf Break

Lat Long: 21.42° N 157.74° W

Issued: 7 pm 14 Jun 2026 (local time)

Forecast update in  hr  min

Today's Castles Beach sea temperature is
26.0° C

Normal for this time of year

Castles Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Castles Beach surf forecast from 15 Jun 2026:

  • Most powerful swell: Monday 15 Jun, 2AM (local time) - 2ft (0.6m), 17s period, SSW swell with 235 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 0.6m 17s and forecast to arrive on Monday (Jun 15) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 10s period and expected on Wednesday (Jun 17) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Mon 15th Jun)2ft (0.6m) 17s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 5mm), mostly falling on Sun night. Warm (max 25°C on Mon afternoon, min 24°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 25°C on Wed night, min 24°C on Wed night). Wind will be generally light.

Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sun
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SSW
17
0.5
SSW
16
1
ENE
11
0.5
S
15
1
ENE
9
1
ENE
9
1
ENE
6
0.4
S
18
0.6
S
17
0.6
S
16
0.6
S
15
0.5
S
14
0.5
S
14
0.4
S
13
0.4
S
13
0.4
S
13
0.9
E
5
0.3
S
15
0.8
E
5
0.4
S
13
1.2
ENE
8
Wave Graph
Metric surfscale
Energy kJ
235
149
214
115
154
161
68
97
215
186
155
107
103
55
54
53
39
39
27
56
168
Wind (km/h)
20
ENE
20
ENE
20
NE
20
ENE
15
ENE
20
ENE
15
E
15
E
15
E
10
E
15
ENE
15
ENE
5
E
10
ENE
10
NE
15
E
15
E
20
ENE
20
ENE
25
ENE
30
NE
Wind State
cross-on
cross-on
cross-on
on
on
cross-on
on
on
on
on
on
on
on
on
cross-on
on
on
cross-on
on
on
cross-on
High Tide
1:17AM0.45m
3:51PM0.99m
2:07AM0.44m
4:35PM0.96m
3:01AM0.43m
5:18PM0.92m
4:03AM0.42m
5:57PM0.86m
5:19AM0.41m
6:34PM0.79m
6:59AM0.42m
7:07PM0.72m
9:04AM0.47m
7:35PM0.65m
Low Tide
10:08PM0.39m
8:00AM-0.06m
10:56PM0.38m
8:44AM-0.03m
11:44PM0.37m
9:29AM0.02m
00:31AM0.35m
10:13AM0.10m
1:16AM0.33m
10:57AM0.20m
2:00AM0.30m
11:46AM0.32m
2:40AM0.26m
12:55PM0.42m
rain showers
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
rain showers
part cloud
part cloud
<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>
7:14
7:14
7:14
7:14
7:15
7:15
7:15
7:15
 mm
5
2
Temp °C
24
24
25
24
24
24
24
24
25
25
24
25
25
25
25
25
25
25
25
24
24
Feels °C
24
23
25
22
24
24
24
25
26
26
26
26
27
28
27
27
27
26
26
23
22
Swell 1
Height (m)
Direction
Period (s)
0.6
SSW
17
0.5
SSW
16
0.5
SSW
16
0.6
ENE
10
0.5
S
14
0.5
S
14
0.4
SSW
14
0.4
SSW
14
0.6
S
17
0.6
S
16
0.6
S
15
0.5
S
14
0.6
NE
9
0.4
S
13
0.4
S
13
0.4
S
13
0.3
S
12
0.3
S
15
0.3
NE
8
0.5
NE
10
0.3
S
13
Energy kJ
235
149
142
63
107
104
62
62
215
186
155
107
61
55
54
53
25
39
11
48
31
Swell 2
Height (m)
Direction
Period (s)
0.2
NNW
7
0.2
ENE
11
0.2
NNW
7
0.5
S
15
0.3
NW
11
0.3
NW
11
0.3
NW
11
0.4
S
18
0.3
NW
10
0.4
NW
10
0.5
NE
9
0.4
NW
10
0.5
S
14
0.4
ESE
6
0.4
NE
8
0.3
NE
8
0.3
NE
8
0.3
S
10
0.3
S
12
0.4
ESE
8
0.3
S
19
Energy kJ
5
13
5
115
19
19
18
97
16
35
43
24
103
10
17
9
9
19
25
21
66
Swell 3
Height (m)
Direction
Period (s)
0.2
S
12
0.2
NNW
7
0.2
S
12
0.3
NW
12
0.2
S
10
0.3
N
10
0.3
N
9
0.4
NW
10
0.2
N
8
0.3
N
10
0.4
NW
10
0.2
N
9
0.4
ESE
5
0.3
NW
9
0.3
NW
9
0.3
S
16
0.2
S
16
0.3
NE
8
0.3
ESE
7
0.4
S
13
0.2
N
8
Energy kJ
11
5
11
22
9
17
15
26
5
17
25
6
9
13
13
48
20
10
10
56
4
Wind waves
Height (m)
Direction
Period (s)
1
ENE
5
1
ENE
5
1
ENE
11
1
ENE
6
1
ENE
9
1
ENE
9
1
ENE
6
0.9
ENE
8
0.9
ENE
8
0.9
ENE
5
0.7
E
5
0.9
ENE
5
0.6
E
5
0.5
NE
8
0.7
E
5
0.9
E
5
0.9
E
5
0.8
E
5
0.8
E
5
0.7
E
5
1.2
ENE
8
Energy kJ
49
46
214
58
154
161
68
96
99
36
25
40
19
33
27
42
39
34
27
22
168
Nearest Offshore or Glassy
Rating
(10 max)
4
3
3
3
3
3
2
3
3
3
3
2
2
2
2
2
2
2
2
2
1
Distance (km)
18
18
18
18
41
18
18
18
18
18
18
18
18
18
18
18
18
18
18
41
123
Best forecast wave conditions in Oahu
Rating
(10 max)
4
4
3
3
3
3
2
3
3
3
3
2
2
2
2
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
4
4
3
4
4
4
3
4
4
3
3
2
3
2
2
3
2
2
2
3
1
Header Global
Rating
(10 max)
5
5
5
5
4
4
5
5
5
9
6
7
5
4
7
4
7
4
9
6
6
  • 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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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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