Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 pm 23 Jul 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
26.5° C
0.2° 

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 24 Jul 2026:

  • Best quality surf: Wednesday 29 Jul, 5AM (local time) - 8ft (2.5m), 11s period, ENE swell with offshore winds.
  • Most powerful swell: Wednesday 29 Jul, 8AM (local time) - 10ft (3.0m), 11s period, ENE swell with 1,857 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 29 Jul, 5AM (local time) - 8ft (2.5m), 11s 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 (Jul 29) at 5AM. The primary swell is predicted to be 2.5m and 11s period with a secondary swell of 0.7m and 14s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Number Fours in the next 16 days are 3.0m 11s and forecast to arrive on Wednesday (Jul 29) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 8s period and expected on Saturday (Jul 25) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 29th Jul)8ft (2.5m) 11s
Best Surf 5AM (Wed 29th Jul)8ft (2.5m) 11s
Most Powerful 8AM (Wed 29th Jul)10ft (3.0m) 11s

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


The Lowdown

Alright, Rusty here, lookin' at the forecast for Number Fours. Let's be real, it's a bit of a mixed bag, but we've got a couple of windows that are worth watchin' for.

First off, the water temp is sittin' at 80°, which is pretty much spot on for this time of year. Feels like summer.

The first few days are a bit of a write-off, honestly. Thursday the 23rd through to the 27th, we're stuck with a persistent cross-off breeze from the ENE, mostly a Fresh to Strong breeze, with swell all over the shop. The energy is there, but it's messy. We see a combined energy of 963 on Thursday afternoon, but the wind is just too strong, and the swell is either too short period or from the wrong direction. It's clean, but it's not surfable. Those scores tell the story – it's a hard pass for a while.

Saturday the 27th and Monday the 28th are similar, just a grind of mid-period swell and cross-off wind. Not worth paddling out for.

Now, here's where it gets interesting. The standout window is the morning of Wednesday the 29th of July. We're looking at a solid 10ft swell from the ENE, with a period of 11 seconds, and the wind switches to an offshore from the N, only 12 mph. That's a game-changer. The combined energy jumps to 1898, which is serious. The water will be clean, and for experienced surfers, this is the real deal. It's a reef, and with that size and direction, it's going to be a proper session. Just be aware, it's a fairly consistent spot, but crowds can show up sometimes. Don't be a kook and get in over your head, that's an expert-only day.

The next few days after that, from the 30th to the 5th of August, slide back into mediocrity. The wind stays cross-off, the swell drops back to 5ft to 7ft, and the period goes short again. The energy is moderate, but the quality isn't there. It's a long stretch of just average surf.

Then, we get another promising window. Thursday the 6th of August. The morning sees a 5ft swell from the ENE, period of 10 seconds, and a very light breeze from the ENE at only 6 mph. That's verging on glassy. The combined energy is 708, and it's described as "very good surf conditions." The afternoon holds up with a similar swell and a gentle breeze. This is a solid call for a fun, clean surf, and it's a lot more accessible for the intermediate crew.

The final day on the 7th of August is a letdown. The swell dies off to a pathetic 1ft with very weak energy (91 and 43), and the direction is all over the place. A total flat spell to end the run.

So, the two standout sessions are the morning of the 29th of July for the big-wave crew, and the 6th of August for a cleaner, more manageable day. The rest, you're better off waitin' for the next forecast.

Rusty, signing off.

Short Range Forecast

Light rain (total 2mm), mostly falling on Sat night. Warm (max 26°C on Thu afternoon, min 24°C on Thu night). Mainly strong winds.

Days 5-7 Weather Summary

Some drizzle, heaviest during Wed morning. Warm (max 27°C on Tue afternoon, min 24°C on Sun night). Mainly fresh winds.

Thu
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
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
0
1
2
2
1
2
2
2
2
1
1
2
3
2
3
4
3
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
SSW
20
0.9
SSW
18
1.9
ENE
7
2
ENE
7
2.1
ENE
7
1.8
ENE
8
0.9
SSW
18
2.1
ENE
8
0.9
SSW
16
1
E
14
1.1
E
14
1.2
E
13
1.2
E
13
2
ENE
12
2
ENE
12
1.8
E
13
2.1
E
12
3
ENE
11
2.2
ENE
10
1.7
ENE
8
Wave Graph
Metric surfscale
Energy kJ
395
464
348
417
456
392
572
547
469
407
452
507
485
1256
1114
1070
1248
1694
894
385
Wind (km/h)
40
ENE
35
ENE
40
ENE
35
ENE
30
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
25
ENE
30
ENE
35
ENE
25
ENE
25
NE
30
NNE
25
NNE
20
N
10
SSW
20
ESE
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
off
on
cross-on
High Tide
11:46PM0.19m
1:44PM0.62m
00:59AM0.18m
2:22PM0.66m
1:51AM0.19m
2:56PM0.68m
2:32AM0.21m
3:29PM0.70m
3:10AM0.23m
3:59PM0.70m
3:49AM0.25m
4:29PM0.70m
4:28AM0.28m
Low Tide
9:13PM0.17m
5:34AM0.05m
9:41PM0.14m
6:23AM0.04m
10:05PM0.12m
7:08AM0.02m
10:27PM0.11m
7:51AM0.01m
10:49PM0.10m
8:31AM0.01m
11:11PM0.09m
9:09AM0.01m
11:34PM0.08m
clear
clear
clear
clear
clear
clear
clear
rain showers
part cloud
clear
part cloud
clear
clear
clear
part cloud
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:01
6:01
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:14
7:13
7:13
7:13
7:12
7:12
7:10
 mm
2
1
1
8
Temp °C
26
25
25
25
25
25
26
25
25
25
25
25
26
25
25
27
25
25
27
26
Feels °C
21
22
22
21
22
23
23
23
22
22
22
24
24
23
24
26
24
26
31
27
  • Map Icons:
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  • 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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