Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 am 09 Jul 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
26.3° C
0.3° 

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 Jul 2026:

  • Most powerful swell: Sunday 12 Jul, 11PM (local time) - 7.5ft (2.3m), 8s period, ENE swell with 607 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 2.3m 8s and forecast to arrive on Sunday (Jul 12) 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 0.8m 8s period and expected on Wednesday (Jul 15) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Sun 12th Jul)7.5ft (2.3m) 8s

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


Alright folks, Rusty here. Let’s get straight into it. The next 16 days at Number Fours are looking like a bit of a mixed bag, but there’s a couple of real beauties hiding in the second week if you’re patient.

Right now, the pattern is stubborn. We’ve got a persistent ENE wind blowing through the whole first week, keeping things choppy and cross-off. The swell is a consistent 6 ft to 7 ft but with a short, weak period of just 7 to 8 seconds, so the energy is all over the place. The combined energy readings are moderate (538 to 854), but the quality is just not there. From Thursday 9th July right through to the morning of Monday 20th July, the surf is either “poor” or just “marginal” at best. It’s a long, flat, and bumpy stretch – not worth paddling out for.

That said, there’s a light at the end of the tunnel. The real standout here is the afternoon of Monday 20th July. The swell drops to 2 ft but the period jumps to a very long 19 seconds from the east. This is a proper groundswell, and the combined energy shoots up to 917 (moderate). The wind is still cross-off at 30 km/h, but that long period will wrap in nicely. This is the kind of window where Number Fours can turn on for intermediates. It’s a reef break, so the long period will actually work in its favour. Crowds are sometimes an issue here, so be ready for a few locals.

But the true best of the whole run is Tuesday 21st July. The morning shows 4 ft at 16 seconds from the east, with a combined energy of 1323 (strong) – that’s serious, grunty swell for this spot. The wind is cross-off at 30 km/h, but the water is clean. The afternoon keeps it going at 4 ft and 16 seconds, with energy still strong at 1091. This is the best on offer by a long shot. The swell direction from the east is a perfect match for this reef’s optimum SSE direction, and the water temp is around 79° which is about average for the time of year, so no need for a steamer.

After that, the rest of the window fades out with smaller, shorter-period junk from the 22nd onwards, with energy dropping off fast. The 23rd and 24th are basically write-offs.

Bottom line: wait for the afternoon of the 20th, and especially the 21st of July. That’s your window. Don’t bother before that unless you want to get frustrated.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 25°C on Thu morning, min 24°C on Thu night). Mainly strong winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 25°C on Sun afternoon, min 24°C on Sun morning). Mainly strong winds.

Thursday
9
Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
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
1
1
0
0
1
1
1
1
1
1
1
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
ENE
8
1.9
ENE
8
1.8
ENE
7
1.8
ENE
7
1.7
ENE
7
1.9
ENE
7
2.1
ENE
7
1.9
ENE
7
1.9
ENE
7
0.9
SW
16
2
ENE
8
2.2
ENE
8
2
ENE
8
1.8
ENE
8
1.8
ENE
7
1.7
ENE
7
1.7
ENE
7
1.7
ENE
7
1.7
ENE
7
1.6
ENE
7
1.9
ENE
7
Wave Graph
Metric surfscale
Energy kJ
403
411
349
344
310
336
432
359
349
405
459
568
464
368
310
310
302
294
271
229
358
Wind (km/h)
35
ENE
40
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
45
ENE
40
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
30
ENE
25
ENE
30
ENE
35
ENE
30
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
12:45PM0.61m
11:18PM0.20m
1:36PM0.69m
00:40AM0.17m
2:24PM0.76m
1:50AM0.16m
3:11PM0.80m
2:52AM0.17m
3:56PM0.82m
3:49AM0.19m
4:39PM0.80m
4:45AM0.22m
5:20PM0.76m
Low Tide
8:17PM0.17m
5:36AM-0.06m
9:18PM0.12m
6:28AM-0.08m
10:04PM0.07m
7:21AM-0.09m
10:45PM0.04m
8:13AM-0.09m
11:23PM0.02m
9:06AM-0.08m
11:59PM0.01m
9:57AM-0.04m
00:34AM0.01m
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clear
part cloud
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clear
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:56
5:56
5:56
5:56
5:56
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:16
7:16
7:16
7:15
7:15
7:15
7:15
 mm
Temp °C
25
25
24
25
25
24
25
25
24
24
25
24
25
25
24
25
25
24
25
25
25
Feels °C
24
22
21
23
22
21
22
22
21
21
21
21
22
22
21
23
23
22
23
22
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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