Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 am 25 Jul 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
26.7° 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 25 Jul 2026:

  • Best quality surf: Wednesday 29 Jul, 2AM (local time) - 10ft (3.0m), 12s period, ENE swell with offshore winds.
  • Most powerful swell: Tuesday 28 Jul, 11PM (local time) - 10ft (3.0m), 13s period, ENE swell with 3,163 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 29 Jul, 2AM (local time) - 10ft (3.0m), 12s 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 2AM. The primary swell is predicted to be 3.0m and 12s 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 13s and forecast to arrive on Tuesday (Jul 28) 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 2.4m 10s period and expected on Wednesday (Jul 29) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Wed 29th Jul)10ft (3.0m) 12s
Best Surf 2AM (Wed 29th Jul)10ft (3.0m) 12s
Most Powerful11PM (Tue 28th Jul)10ft (3.0m) 13s

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


The Lowdown

Alright, this is Rusty, and I’m lookin’ straight at the forecast for Number Fours – a reef setup that’s exposed and loves a good SSE swell. And honestly, the next 16 days are a bit of a mixed bag. We’ve got some solid energy coming through, but the wind is gonna be a persistent cross-off from the ENE, which is a real blessing for keeping the surface clean, but the swell direction is often not quite lining up perfectly with what this spot wants.

The water is sitting at a very comfortable 80°F – that’s almost bang on what you’d expect for this time of year, so no need for a thick suit.

Let’s start with the main event. The stand-out period is Tuesday, July 28. The swell is building, and we’re looking at 7 ft early in the morning from the E, with a solid 13-second period, pushing a combined energy of 1640. That’s a good, powerful groundswell, and the reef should handle it well. The cross-off wind from the NE at 16 mph is gonna keep it glassy. It’s a proper working day, sure, but if you can get out, this is the best wave on offer. The afternoon of the 28th jumps up to 8 ft from the same direction, and the energy jumps to 2348 – that’s serious power. It’s getting into the “experts only” territory at that size, and the winds pick up a touch to 19 mph, but it’s still clean. If you’re a confident surfer, that afternoon session is the one.

Now, the week before that is a bit of a slow burn. Saturday, July 25 has a funky mix. The morning is a disappointing 7 ft from the ENE with a short 8-second period and a stiff 22 mph cross-off wind. The energy is high at 1157, but the short period means it’ll be a bit lumpy and sectiony. The afternoon of the 25th drops to 3 ft but with a gorgeous 18-second period from the SSW – that’s a long period groundswell, but it’s just too small to really light up the reef.

Sunday, July 26 and Monday, July 27 are small, between 3 ft and 5 ft, with the ENE wind holding strong. It’s clean, but you’ll be hunting for the smaller sets.

Wednesday, July 29 sees a shift in wind, with a light SW cross-on at 9 mph in the morning, which is a bit messy. The swell is 8 ft from the ENE, but the wind is onshore, so it’ll be a bit of a chop fest. The afternoon goes onshore from the S, so that’s out.

Thursday, July 30 and Friday, July 31 are back to the ENE cross-off, but the swell is mixed. Friday, July 31 morning has a 8 ft ENE swell with a short 8-second period, and the wind is howling at 28 mph – that’s a strong breeze, making it a real battle. The energy is 1128, but the wind is just too much for a fun paddle.

The first weekend of August, 1st and 2nd, starts with a 8 ft ENE swell on Saturday but the wind is 25 mph – very strong. By Sunday, August 2, the swell drops to 4 ft but the period extends to a beautiful 15-16 seconds. The energy is still good at 1105, and the wind is a more manageable 19 mph. That’s a clean, long-period groundswell, but small. The reef will be making the most of it.

The following week, from Monday, August 3 onward, we see a slow decline. The swell stays around 4 ft to 5 ft with generally good period, but the wind stays stiff from the ENE. The energy drops right off into the 200-300s by the second weekend, and the period shortens right down to 6-7 seconds. The last few days, from Thursday, August 6 to Sunday, August 9, are a write-off. The waves are weak, short period, and the forecasts are calling it “poor surf conditions.” It’s a real flat spell to end the period.

So, to wrap it up: the best bet is Tuesday, July 28. The morning is a solid, clean 7 ft, and the afternoon is a powerful, expert-level 8 ft. The reef will be working. The long-period groundswell on Sunday, August 2 is the other interesting one, but you’ll be on a shortboard for the small clean waves. Crowds are _sometimes_ a thing here, so you might have a few others out on the good days.

Stay stoked.

Rusty

Short Range Forecast

Mostly dry. Warm (max 26°C on Sat afternoon, min 24°C on Sat night). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Wed night. Warm (max 27°C on Tue afternoon, min 25°C on Tue morning). Winds increasing (light winds from the W on Wed morning, fresh winds from the ENE by Thu night).

Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
2
2
2
2
1
1
3
3
2
4
2
2
0
1
2
1
1
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)
2.1
ENE
8
0.9
SSW
18
0.9
SSW
18
0.9
SSW
16
1.1
E
14
1.3
E
14
1.3
E
13
1.4
E
13
2.3
ENE
13
2.1
E
13
2.5
E
13
3
ENE
12
2.5
ENE
11
2.1
ENE
10
1.6
ENE
8
1.7
ENE
8
1.6
ENE
8
1.8
ENE
7
2.5
ENE
8
2
E
8
2.5
E
8
Wave Graph
Metric surfscale
Energy kJ
480
572
547
469
499
697
595
670
1739
1487
2149
2716
1567
804
341
373
280
365
681
484
958
Wind (km/h)
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
30
ENE
30
ENE
30
NE
25
NE
25
NE
30
NE
15
N
15
SW
15
S
15
SE
25
ENE
25
ENE
25
ENE
45
ENE
40
ENE
40
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
off
cross-on
on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
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
4:58PM0.68m
5:11AM0.31m
5:26PM0.64m
Low Tide
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
9:48AM0.03m
11:58PM0.07m
10:29AM0.06m
00:22AM0.06m
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
thunderstorm
clear
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:01
6:03
6:03
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:13
7:13
7:12
7:12
7:10
7:10
7:09
 mm
4
Temp °C
25
26
25
25
25
25
25
26
25
26
27
26
26
27
26
27
27
26
26
26
25
Feels °C
22
23
22
22
22
22
23
24
24
26
26
26
28
29
29
26
28
24
23
22
22
  • 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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