Number Fours surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 1 am Thursday 23 Apr 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
25.1° C
(Which is slightly warmer than usual)

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 Monday (Apr 27) at 5AM. The primary swell is predicted to be 0.6m and 14s period. 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 1.7m 6s and forecast to arrive on Wednesday (Apr 29) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Saturday (Apr 25) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 27th Apr)2ft (0.6m) 14s
Best Surf 5AM (Mon 27th Apr)2ft (0.6m) 14s
Most Powerful 5AM (Wed 29th Apr)5.5ft (1.7m) 6s

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 25°C on Thu morning, min 23°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 8mm), mostly falling on Tue afternoon. Warm (max 25°C on Sun afternoon, min 23°C on Sun morning). Mainly fresh winds.

Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
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
1
0
1
1
0
0
0
0
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
0.5
E
7
0.7
ENE
7
0.8
NNE
10
0.2
SSW
16
0.3
SW
16
0.4
SSW
13
0.5
SW
15
0.6
SSW
16
0.6
SSW
15
0.6
SW
14
0.6
SW
14
0.6
SW
14
1.2
ENE
8
1.3
ENE
8
1.2
ENE
7
1.1
ENE
7
1.1
ENE
7
0.4
SW
12
1.5
ENE
7
1.5
ENE
7
1.3
ENE
7
Wave Graph
Metric surfscale
Energy kJ
27
47
0
25
40
68
113
162
146
169
167
153
154
173
144
114
105
36
200
195
144
Wind (km/h)
20
ENE
20
NE
20
NE
20
NE
25
NE
20
NE
25
ENE
30
ENE
25
ENE
25
ENE
30
ENE
20
ENE
25
ENE
30
ENE
15
ENE
25
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
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
10:46AM0.12m
10:27PM0.55m
12:06PM0.19m
11:27PM0.51m
12:58PM0.27m
00:17AM0.46m
1:38PM0.34m
1:01AM0.41m
2:14PM0.41m
1:39AM0.36m
2:46PM0.48m
2:14AM0.31m
3:18PM0.52m
2:47AM0.27m
Low Tide
2:32PM0.07m
6:16AM-0.02m
4:20PM0.10m
6:49AM-0.04m
5:52PM0.11m
7:15AM-0.05m
7:05PM0.10m
7:39AM-0.06m
8:07PM0.09m
8:00AM-0.07m
9:01PM0.08m
8:20AM-0.07m
9:50PM0.06m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
rain showers
rain showers
clear
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:03
6:03
6:03
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:53
6:53
6:53
6:54
6:54
1
1
1
1
3
1
Temp °C
25
25
24
24
24
24
24
25
24
24
25
24
25
25
24
24
24
24
24
24
23
25
25
23
22
22
22
23
23
23
22
23
23
24
23
22
23
21
21
21
21
20
Swell 1
Height (m)
Direction
Period (s)
0.9
NNE
11
0.9
NNE
11
0.8
NNE
10
0.7
NNE
9
0.8
NNE
9
0.4
WNW
12
0.5
SW
15
0.6
SSW
16
0.6
SSW
15
1.2
NE
8
0.6
SW
14
0.6
SW
14
1.2
ENE
8
1.3
ENE
8
1.2
ENE
7
1.1
ENE
7
0.4
SW
12
0.4
SW
12
0.4
NNW
15
0.5
NW
14
0.6
NNW
13
Energy kJ
183
161
111
76
92
47
113
162
146
164
167
153
154
173
144
114
37
36
84
95
108
Swell 2
Height (m)
Direction
Period (s)
0.5
W
13
0.5
W
12
0.4
W
12
0.5
W
13
0.5
W
13
0.4
SSW
13
0.4
WNW
11
0.4
NNW
13
0.4
NNW
12
0.6
SW
14
0.4
NNW
12
0.4
NW
11
0.6
SSW
13
0.6
SSW
13
0.5
SW
13
0.4
SSW
12
0.3
NW
14
0.4
NW
13
0.4
SW
12
0.3
SW
11
0.3
NE
9
Energy kJ
80
77
46
87
84
68
43
67
58
169
53
31
118
116
83
58
33
46
35
19
13
Swell 3
Height (m)
Direction
Period (s)
0.4
NNW
12
0.4
NW
12
0.4
WNW
15
0.2
SSW
16
0.3
SW
16
0.4
NW
12
0.4
NW
14
0.3
WNW
11
0.3
WNW
11
0.4
NNW
12
0.2
W
10
0.2
NNE
10
0.4
NW
11
0.4
NW
11
0.4
NW
10
0.3
NE
9
0.2
NNW
10
0.2
NNE
8
0.2
NNE
10
0.3
NE
10
0.2
SSW
11
Energy kJ
58
37
71
25
40
38
49
23
22
57
7
10
30
29
27
12
10
6
10
15
11
Wind waves
Height (m)
Direction
Period (s)
0.5
E
7
0.7
ENE
7
0.8
ENE
4
0.8
ENE
5
0.6
ENE
5
1.1
NE
9
1.4
NE
8
1.4
NE
8
1.3
NE
8
1.2
NE
8
1.1
NE
8
0.9
ENE
7
1.1
ENE
7
1.4
ENE
6
1.5
ENE
7
1.5
ENE
7
1.3
ENE
7
Energy kJ
27
47
26
28
17
193
260
260
221
160
151
73
105
126
200
195
144
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
2
1
1
2
1
1
1
1
1
1
2
2
2
2
Distance (km)
1
1
1
28
1
1
2
31
1
1
31
1
31
31
31
31
31
31
31
33
33
Best forecast wave conditions in Oahu
Rating
(10 max)
3
2
2
2
2
2
3
3
3
3
3
2
2
2
1
1
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
3
2
3
3
3
2
3
3
3
3
3
2
2
2
2
2
2
2
2
2
3
Header Global
Rating
(10 max)
5
5
5
5
4
4
4
4
6
6
8
5
6
6
4
6
9
5
8
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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