Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 am 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
27.3°C
0.4° 

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 28 Aug 2026:

  • Most powerful swell: Thursday 3 Sep, 11PM (local time) - 6.5ft (2.0m), 12s period, ENE swell with 1,066 kJ wave energy.

Best Forecast Surf Conditions for Number Fours this week:

The most powerful waves expected at Number Fours in the next 16 days are 2.0m 12s and forecast to arrive on Thursday (Sep 03) 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 1.7m 8s period and expected on Wednesday (Sep 02) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Thu 3rd Sep)6.5ft (2.0m) 12s

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


The Lowdown

G'day, Rusty here. Let's have a look at what Number Fours is serving up over the next couple of weeks.

Right off the bat, I gotta be straight with you – it's a bit of a slow cooker. There's nothing happening at all right now, and the first real chance of a wave doesn't roll in until Friday the 28th of August, and even then, it's pretty average. We're looking at a clean, cross-off wind from the ENE at 22 mph, but the swell is tiny at 3 ft from the S, and the combined energy is only moderate (499). The water's sitting at 81°, which is about average for this time of year. Honestly, the conditions are poor, so this one is a skip.

The rest of that first weekend and into the start of the week is a write-off. Saturday the 29th and Sunday the 30th see the swell bump up to 5 ft - 7 ft, but it's all short-period, messy ENE windswell with a fresh breeze cross-off. The wave quality is poor to marginal at best. Monday the 31st and Tuesday the 1st of September are much the same story – a bit of size, but no shape.

Then we hit a bit of a gap. Wednesday the 2nd of September morning has a pulse of long-period S swell at 3 ft and a period of 16 seconds, but the energy is weak (471) and the conditions are rated poor. That's not enough to get excited about. The rest of that week and into the first few days of September sees the swell hanging around the 6 ft to 7 ft mark from the ENE, still with a fresh cross-off wind. The combined energy is starting to climb into the strong range (767-894), but the quality is still only marginal. It's clean, but the wind isn't doing us any favours for proper shape.

Now, here's where things get interesting. The standout window, and the only real highlight in this whole outlook, arrives on Friday the 4th of September. We start seeing a jump in quality. The swell pushes up to 6 ft from the ENE with a longer period of 11 seconds, and the combined energy is strong (1099). That's a proper groundswell pulse. The wind is still a cross-off from the NE at 19 mph, keeping it clean. This is your best bet for the whole run. It's a reef break, so it handles a longer-period swell well, and it's fairly consistent. Just a heads up, crowds are sometimes a factor here. Saturday the 5th holds similar size at 7 ft, but the period drops back to 10 seconds, and the energy stays strong (1174). It's still a good option, but Friday is the pick.

Sunday the 6th of September sees the swell hold at 8 ft from the ENE with a 9-second period, and the energy is very strong (1454). It's getting a bit big for beginners now. Monday the 7th stays solid at 8 ft. Both days have that cross-off wind keeping it clean.

Then, on Tuesday the 8th of September, we get a real treat. The wind swings around to a light offshore from the NNE at 16 mph. The swell is 8 ft from the ENE with an 8-second period and very strong energy (1206). This is the best wind condition we've seen all outlook. The waves will be glassy and clean. Later that afternoon, the wind shifts to a fresh offshore from the N at 22 mph, with the swell pushing 8 ft. This is expert territory size-wise, but if you've got the skills, the offshore wind on a reef break like Number Fours will be something special.

After that, things get a bit messy. Wednesday the 9th of September looks nasty with a near gale cross-off from the ENE and a risk of thunderstorms. The surf is up but the conditions are poor. Thursday the 10th calms down but the wind goes cross-shore, creating chop. From Friday the 11th onward, the wind turns onshore, the quality drops right off, and it's not worth paddling out.

So, to sum it up: the first week is a write-off. The real action is from Friday the 4th of September through to Tuesday the 8th of September. If I had to pick just one, I'd be looking at Friday the 4th for the best all-rounder, or Tuesday the 8th for those who can handle a bigger wave with clean offshore winds. The rest of the run is pretty forgettable.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Fri morning, min 25°C on Fri morning). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Mon night). Mainly fresh winds.

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
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
1
1
0
0
0
1
0
1
1
1
1
1
1
1
0
1
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)
0.8
S
14
0.9
S
14
0.8
S
13
1.5
ENE
6
1.5
ENE
7
1.9
ENE
7
1.7
ENE
7
2
ENE
7
1.7
ENE
7
2.1
ENE
7
1.8
ENE
8
1.9
ENE
8
1.8
ENE
8
1.9
ENE
8
1.9
ENE
8
0.9
S
16
1.7
ENE
8
2
ENE
8
1.8
ENE
8
1.7
ENE
8
2
ENE
7
Wave Graph
Metric surfscale
Energy kJ
260
329
229
172
189
336
285
371
273
397
353
410
412
454
476
422
363
527
404
385
415
Wind (km/h)
35
ENE
30
ENE
30
ENE
35
ENE
35
ENE
35
ENE
35
ENE
40
ENE
30
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
NE
25
ENE
Wind State
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
4:20PM0.62m
4:47AM0.46m
4:49PM0.57m
5:30AM0.50m
5:18PM0.51m
6:18AM0.53m
5:48PM0.44m
7:14AM0.56m
6:20PM0.36m
8:21AM0.59m
6:54PM0.28m
9:39AM0.62m
7:57PM0.22m
Low Tide
9:46AM0.07m
10:54PM0.07m
10:31AM0.10m
11:17PM0.05m
11:22AM0.14m
11:42PM0.05m
12:22PM0.19m
00:10AM0.05m
1:40PM0.23m
00:43AM0.05m
3:38PM0.25m
1:25AM0.06m
6:22PM0.22m
2:24AM0.08m
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:13
6:13
6:13
6:15
6:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:51
6:50
6:49
6:47
6:46
6:45
6:45
 mm
Temp °C
26
26
25
26
26
25
26
26
25
26
26
26
26
27
26
27
27
26
26
26
25
Feels °C
23
24
23
23
23
22
23
23
22
24
23
24
24
25
25
26
25
25
23
24
23
  • 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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