Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 7 am 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 8 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 8 Sep, 11AM (local time) - 8ft (2.5m), 10s period, SSW swell with 1,102 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. Another secondary swell of 0.9m and 8s is also forecast. 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 2.5m 10s and forecast to arrive on Tuesday (Sep 08) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 10s period and expected on Tuesday (Sep 08) at 11AM.

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 Powerful11AM (Tue 8th Sep)8ft (2.5m) 10s

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


Short Range Forecast

Light rain (total 6mm), mostly falling on Wed night. Warm (max 28°C on Tue afternoon, min 25°C on Thu night). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Tue night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 27°C on Sun afternoon, min 25°C on Fri morning). Wind will be generally light.

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
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
2
3
3
3
1
1
2
2
2
2
1
1
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.5
SSW
10
1.7
ENE
11
1.4
ENE
10
0.9
SSW
14
0.9
SSW
13
1.3
ENE
7
1.5
ENE
7
1.5
ENE
7
0.7
SW
16
1.1
ENE
11
1.1
ENE
11
1.2
ENE
10
0.7
SW
15
0.5
SW
16
0.7
ENE
9
0.5
SW
15
0.4
SSW
15
0.4
SW
12
0.4
SW
14
0.5
SW
22
0.5
SW
21
Wave Graph
Metric surfscale
Energy kJ
1102
650
378
269
257
181
237
225
268
314
297
292
242
124
84
107
84
37
49
227
224
Wind (km/h)
35
SSW
25
SW
10
SW
5
ENE
15
NE
15
ENE
25
ENE
25
ENE
20
NE
20
ENE
20
ENE
20
ENE
20
ENE
20
NE
20
ENE
25
ENE
20
NE
15
NE
20
ENE
25
NE
20
ENE
Wind State
cross-on
cross-on
cross-on
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
2:28PM0.72m
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
thunderstorm
clear
clear
part cloud
part cloud
rain showers
thunderstorm
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
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
2
3
1
1
Temp °C
27
28
27
27
28
27
27
27
25
26
26
26
26
26
25
26
27
26
27
27
26
Feels °C
26
28
30
30
31
30
27
26
25
25
25
26
26
26
25
26
27
27
28
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)
Map placeholder
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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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