Number Fours surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 1 am Monday 25 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Number Fours surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Number Fours sea temperature is
25.3° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Number Fours this week:

The surf forecast for Number Fours over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (May 31) at 5AM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.9m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Number Fours in the next 16 days are 2.2m 8s and forecast to arrive on Monday (May 25) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Saturday (May 30) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 31st May)2.5ft (0.8m) 16s
Best Surf 5AM (Sun 31st May)2.5ft (0.8m) 16s
Most Powerful 8AM (Mon 25th May)7ft (2.2m) 8s

Table - best surf conditions forecast for Number Fours over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 24°C on Mon morning, min 23°C on Mon morning). Mainly strong winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 25°C on Sat afternoon, min 23°C on Thu morning). Winds decreasing (fresh winds from the ENE on Thu morning, light winds from the NE by Sat night).

Monday
25
Tuesday
26
Wednesday
27
Thursday
28
Friday
29
Saturday
30
Sunday
31
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
1
0
0
0
0
0
1
1
1
1
2
0
1
1
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
ENE
8
2
ENE
8
2.2
ENE
7
2
ENE
7
2.1
ENE
7
2
ENE
7
1.7
ENE
7
1.5
ENE
7
1.8
ENE
7
1.4
ENE
7
1.5
ENE
7
0.6
S
21
0.8
S
20
0.9
S
19
0.9
S
18
0.9
S
17
0.8
S
16
0.8
S
16
0.8
SSW
15
0.7
S
15
0.6
S
19
Wave Graph
Metric surfscale
Energy kJ
541
483
489
405
449
404
305
249
303
192
223
329
495
593
509
470
339
318
300
209
276
Wind (km/h)
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
25
ENE
20
ENE
25
ENE
20
ENE
20
ENE
20
NE
20
NE
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
1:17PM0.42m
00:06AM0.30m
1:54PM0.49m
00:50AM0.25m
2:27PM0.55m
1:31AM0.21m
2:59PM0.59m
2:11AM0.17m
3:31PM0.62m
2:51AM0.15m
4:04PM0.63m
3:30AM0.13m
4:39PM0.64m
4:10AM0.12m
Low Tide
7:16PM0.16m
6:39AM-0.06m
8:25PM0.13m
7:03AM-0.06m
9:23PM0.11m
7:27AM-0.07m
10:12PM0.09m
7:53AM-0.07m
10:55PM0.07m
8:21AM-0.06m
11:37PM0.05m
8:52AM-0.06m
00:19AM0.05m
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
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>
7:06
7:07
7:07
7:07
7:07
7:07
7:08
Temp °C
24
24
23
24
24
23
24
24
23
23
24
23
24
24
23
24
25
23
24
25
24
20
20
19
20
20
18
20
20
19
20
20
20
21
21
19
23
23
21
23
24
24
Swell 1
Height (m)
Direction
Period (s)
0.5
S
14
0.5
S
13
0.5
S
13
0.4
S
13
0.4
S
12
0.6
S
15
0.6
S
14
0.6
S
14
0.6
S
13
0.6
S
12
0.6
S
12
0.6
S
21
0.8
S
20
0.9
S
19
0.9
S
18
0.9
S
17
1.1
NE
7
0.9
E
8
0.8
SSW
15
0.7
S
15
0.8
SSW
14
Energy kJ
97
85
84
51
47
150
144
129
121
105
103
329
495
593
509
470
102
90
300
209
276
Swell 2
Height (m)
Direction
Period (s)
0.2
NNW
11
0.2
NNW
11
0.2
NNW
10
0.3
S
16
0.3
S
16
0.4
NW
16
0.5
NW
15
0.5
NW
14
0.4
NW
13
0.4
NW
12
0.4
NW
12
0.5
S
12
0.6
N
10
0.4
S
11
0.5
S
13
0.4
S
12
0.9
E
7
0.8
S
16
0.3
N
8
0.4
NNE
8
0.6
S
19
Energy kJ
12
11
10
45
45
91
104
96
61
52
52
67
74
39
79
44
88
318
12
22
270
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
20
0.1
S
19
0.1
SW
19
0.1
NW
10
0.3
NW
18
0.2
SSE
8
0.1
SW
18
0.2
SSE
5
0.3
NNE
13
0.4
NNE
12
0.3
N
11
0.4
NNE
11
0.5
S
11
0.4
NNE
10
0.4
NNE
11
0.3
NNE
10
0.8
S
16
0.4
NNW
9
0.3
S
10
0.3
S
11
0.3
NNE
8
Energy kJ
15
7
15
4
50
7
12
3
32
48
20
38
61
31
38
20
339
26
19
20
12
Wind waves
Height (m)
Direction
Period (s)
2.1
ENE
8
2
ENE
8
2.2
ENE
7
2
ENE
7
2.1
ENE
7
2
ENE
7
1.7
ENE
7
1.5
ENE
7
1.8
ENE
7
1.4
ENE
7
1.5
ENE
7
1.7
ENE
7
1.4
ENE
7
1.4
ENE
7
1.4
ENE
7
1.3
ENE
7
1
NE
7
1.1
ENE
7
1.1
ENE
7
1.1
ENE
7
Energy kJ
541
483
489
405
449
404
305
249
303
192
223
265
191
197
203
172
94
140
140
136
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
1
2
2
2
2
2
2
2
2
2
1
3
3
2
2
2
2
3
Distance (km)
39
44
39
39
46
39
33
42
31
34
39
31
31
39
31
1
2
1
1
1
1
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
1
2
3
3
3
2
2
2
3
3
3
3
3
3
3
2
2
3
Best forecast wave conditions in United States
Rating
(10 max)
2
2
3
2
2
3
4
3
2
2
2
4
3
4
4
3
3
4
3
4
3
Header Global
Rating
(10 max)
4
4
9
6
7
7
9
6
7
7
6
5
5
5
5
4
4
7
5
5
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 Number Fours Surf forecast

The above surf forecast table for Number Fours provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Number Fours can be found by selecting the local surf guide option on the grey menu. Our Number Fours 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 (Number Fours) 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 Number Fours 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.

Number Fours is 5 km (3 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.

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