Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 7 pm 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
27.1°C
0.1° 

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


Number Fours surf forecast from 9 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 5AM (local time) - 4.5ft (1.3m), 10s period, ENE swell with glassy winds.
  • Most powerful swell: Tuesday 15 Sep, 11PM (local time) - 2.5ft (0.8m), 19s period, SSW swell with 480 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 4.5ft (1.3m), 10s period with ENE swell.

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 Wednesday (Sep 09) at 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.3m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Number Fours in the next 16 days are 0.8m 19s and forecast to arrive on Tuesday (Sep 15) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 8s period and expected on Monday (Sep 14) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 9th Sep)4.5ft (1.3m) 10s
Best Surf 5AM (Wed 9th Sep)4.5ft (1.3m) 10s
Most Powerful11PM (Tue 15th Sep)2.5ft (0.8m) 19s

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


Short Range Forecast

Light rain (total 2mm), mostly falling on Wed night. Warm (max 28°C on Wed afternoon, min 25°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the ENE by Thu afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Mon afternoon, min 24°C on Sat night). Wind will be generally light.

Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
3
2
2
0
2
2
1
2
1
1
1
0
1
1
0
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)
1.4
ENE
10
0.9
SSW
14
0.9
SSW
13
0.7
E
13
1.5
ENE
7
1.5
ENE
7
0.7
SW
16
1.3
ENE
11
1
ENE
11
1.3
ENE
10
0.7
SW
15
0.5
SW
16
0.6
SSW
13
0.5
SW
15
0.4
SSW
15
0.4
SSW
12
0.3
SW
23
0.5
SW
22
0.5
SW
21
Wave Graph
Metric surfscale
Energy kJ
378
269
257
176
237
210
268
387
249
308
242
124
116
107
84
61
86
227
224
Wind (km/h)
5
W
5
ENE
10
NE
10
ENE
20
ENE
30
ENE
20
NE
20
ENE
20
ENE
15
ENE
15
ENE
15
NE
15
NE
20
ENE
15
NE
15
NE
20
ENE
20
NE
15
NE
Wind State
cross
glassy
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
2:51AM0.39m
3:05PM0.69m
3:32AM0.45m
3:39PM0.64m
4:11AM0.50m
4:12PM0.57m
4:51AM0.54m
4:42PM0.50m
5:31AM0.57m
5:11PM0.43m
6:14AM0.58m
5:40PM0.36m
Low Tide
9:22PM0.06m
8:21AM0.06m
9:46PM0.05m
9:12AM0.07m
10:10PM0.04m
10:02AM0.10m
10:33PM0.04m
10:52AM0.13m
10:56PM0.05m
11:45AM0.17m
11:19PM0.06m
12:45PM0.20m
11:42PM0.08m
clear
clear
part cloud
rain showers
rain showers
part cloud
part cloud
clear
clear
part cloud
clear
part cloud
clear
part cloud
clear
clear
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:16
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:39
6:38
6:37
6:37
6:36
6:35
 mm
1
1
Temp °C
27
27
28
27
27
27
26
26
26
25
26
26
25
26
26
25
26
27
26
Feels °C
30
31
32
31
28
27
26
25
25
25
26
26
25
26
25
26
26
27
27
  • 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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