Castles Beach Surf Break

Castles Beach Surf Forecast and Surf Report

Lat Long: 21.42° N 157.74° W

Issued: 7 pm 17 Jun 2026 (local time)

Forecast update in  hr  min

Today's Castles Beach sea temperature is
25.9° 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.

Surf Forecasts:

Castles Beach surf forecast from 18 Jun 2026:

  • Most powerful swell: Wednesday 24 Jun, 11PM (local time) - 6.5ft (2.0m), 7s period, ENE swell with 356 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 2.0m 7s and forecast to arrive on Wednesday (Jun 24) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 8s period and expected on Tuesday (Jun 23) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Wed 24th Jun)6.5ft (2.0m) 7s

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 6mm), mostly falling on Wed night. Warm (max 26°C on Thu afternoon, min 24°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Sat night. Warm (max 25°C on Sat night, min 24°C on Sat night). Mainly fresh winds.

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wed
24
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
1
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
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
0.3
S
12
0.3
S
20
0.3
S
19
0.6
NE
11
0.6
NE
11
0.6
NE
10
0.6
NE
10
1.3
ENE
6
1.5
ENE
7
1.7
ENE
7
1.3
ENE
6
1.7
ENE
6
Wave Graph
Metric surfscale
Energy kJ
186
155
107
103
55
57
53
43
39
25
67
66
97
94
67
73
113
204
249
125
197
Wind (km/h)
10
E
15
E
15
E
15
E
20
E
15
ENE
15
E
15
E
15
ENE
15
ENE
15
ENE
15
NE
20
ENE
20
ENE
25
ENE
30
E
25
ENE
25
ENE
30
ENE
30
ENE
30
ENE
Wind State
on
on
on
on
on
on
on
on
cross-on
on
cross-on
cross-on
on
cross-on
on
on
cross-on
cross-on
on
cross-on
cross-on
High Tide
4:03AM0.42m
5:57PM0.86m
5:19AM0.41m
6:34PM0.79m
6:59AM0.42m
7:07PM0.72m
9:04AM0.47m
7:35PM0.65m
10:54AM0.55m
8:01PM0.59m
11:57AM0.64m
8:28PM0.53m
12:38PM0.71m
Low Tide
00:31AM0.35m
10:13AM0.10m
1:16AM0.33m
10:57AM0.20m
2:00AM0.30m
11:46AM0.32m
2:40AM0.26m
12:55PM0.42m
3:17AM0.23m
3:03PM0.51m
3:53AM0.20m
5:49PM0.52m
4:29AM0.17m
7:52PM0.48m
rain showers
clear
thunderstorm
thunderstorm
clear
clear
clear
part cloud
clear
rain showers
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
rain showers
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
5:48
—
—
5:48
—
—
5:48
—
—
5:48
—
—
5:48
—
—
5:50
—
—
5:50
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:14
—
7:15
—
—
7:15
—
—
7:15
—
—
7:15
—
—
7:15
—
—
7:15
—
—
7:15
 mm
3
—
2
1
—
—
—
—
—
1
—
—
—
—
—
—
—
—
4
1
—
Temp °C
24
25
26
25
25
25
25
25
26
25
24
24
24
24
24
24
24
24
24
24
24
Feels °C
26
28
28
28
26
27
27
26
27
26
25
24
24
24
24
22
24
22
22
22
22
Swell 1
Height (m)
Direction
Period (s)
0.6
S
16
0.6
S
15
0.5
S
14
0.5
S
14
0.4
S
13
0.4
S
13
0.7
E
5
0.3
S
12
0.3
S
12
0.3
NE
8
0.4
NE
8
0.5
NE
8
0.6
NE
11
0.6
NE
11
0.6
NE
10
0.6
NE
10
0.6
NE
10
0.5
N
8
0.5
N
8
0.5
NE
9
0.4
SSW
18
Energy kJ
186
155
107
103
55
54
27
27
25
11
23
29
97
94
67
61
58
28
28
41
102
Swell 2
Height (m)
Direction
Period (s)
0.4
NW
10
0.5
NE
9
0.5
NE
9
0.4
NE
9
0.4
NE
8
0.3
NE
6
0.4
S
13
0.3
NW
8
0.3
S
15
0.3
ESE
7
0.4
S
13
0.3
S
13
0.3
S
18
0.3
NNW
7
0.3
NNW
7
0.3
NNW
6
0.5
N
8
0.2
NNE
8
0.3
NNE
8
0.5
N
7
0.3
N
8
Energy kJ
35
43
39
27
23
5
53
11
39
10
56
31
55
9
9
8
31
7
13
23
12
Swell 3
Height (m)
Direction
Period (s)
0.3
N
10
0.4
NW
10
0.4
NW
10
0.3
NW
9
0.3
NW
9
0.3
NW
9
0.4
NE
8
0.3
NE
7
0.3
NW
8
0.3
S
12
0.3
S
20
0.3
S
19
0.3
S
13
0.3
S
12
0.3
S
16
0.2
N
8
0.2
S
11
0.2
S
15
0.3
SSW
19
0.3
SSW
18
0.2
SSE
9
Energy kJ
17
25
24
13
13
13
14
9
11
25
67
66
29
25
46
5
10
17
74
61
8
Wind waves
Height (m)
Direction
Period (s)
0.9
ENE
5
0.8
E
5
0.9
E
5
0.7
E
5
0.9
E
5
1
E
5
0.9
E
5
0.9
E
5
0.8
E
5
0.7
E
5
0.6
E
7
0.6
E
7
0.7
ENE
4
0.7
E
4
0.9
ENE
5
1.2
ENE
5
1.3
ENE
6
1.5
ENE
7
1.7
ENE
7
1.3
ENE
6
1.7
ENE
6
Energy kJ
36
33
42
25
40
57
43
43
32
21
37
37
19
18
48
73
113
204
249
125
197
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Rating
(10 max)
3
3
2
2
2
2
2
1
2
2
2
2
2
2
2
1
1
1
2
2
1
Distance (km)
18
18
18
18
41
18
18
18
19
18
18
18
18
18
18
41
42
42
41
41
123
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(10 max)
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Header Global
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South Africa
Rating
(10 max)
5
9
5
6
7
4
9
5
9
4
7
7
5
6
5
6
5
7
9
8
6
  • 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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