Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 pm 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
26.8° 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 1 Aug 2026:

  • Best quality surf: Tuesday 4 Aug, 5PM (local time) - 4.5ft (1.4m), 11s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Saturday 1 Aug, 11AM (local time) - 10ft (3.0m), 8s period, E swell with 1,234 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 5PM (local time) - 4.5ft (1.4m), 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 Tuesday (Aug 04) at 5PM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 0.4m and 11s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Number Fours in the next 16 days are 3.0m 8s and forecast to arrive on Saturday (Aug 01) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 8s period and expected on Thursday (Aug 06) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Tue 4th Aug)4.5ft (1.4m) 11s
Best Surf 5PM (Tue 4th Aug)4.5ft (1.4m) 11s
Most Powerful11AM (Sat 1st Aug)10ft (3.0m) 8s

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 has got cooking for us over the next couple of weeks.

Right off the bat, the opening days are a bit of a write-off. There’s some serious size on the cards – we’re talking 8ft to 10ft of short-period, wind-affected E swell – but those nasty cross-off winds are blowing 25 to 28 mph, absolutely shredding any hope of a clean wave. The energy readings are high, in the 1400s, but that’s just raw power with no finesse. This is more of a kite-surfing show than a paddler’s dream, and the surf reports aren’t kind. There’s a real gap here until things settle down.

We start seeing some hope on Monday the 4th of August. Tuesday afternoon the 5th of August is where it starts to get interesting. The swell drops to a much more manageable 5ft from the ENE, but the kicker is the period jumps to 11 seconds, bringing in some proper groundswell energy. The wind eases right back to a gentle breeze at 9 mph, so the conditions clean up nicely. The energy is still moderate (531), and while it’s a cross-off wind, it’s light and won’t ruin things. This is a solid option for intermediate surfers. You’ll want to be out there Tuesday afternoon – the report even says to expect very good surf.

Wednesday the 6th of August keeps things tidy, with chest-high 4ft waves and that 9-second period. Lighter winds again. It’s not a huge session, but it’s clean and fun, with good energy in the water (335).

After that, we hit another patch of less-than-ideal conditions from Thursday the 7th through to the 9th, with the wind picking back up into the fresh breeze range, making things messy.

The standout of the entire forecast is without a doubt Tuesday afternoon the 5th of August at Number Fours. You’ve got a solid 5ft of ENE groundswell with an 11-second period, light gentle breeze, and very good surf conditions. The crowd is only there “sometimes,” so you could easily find a peak to yourself. For a reef break that’s fairly consistent and best on an SSE swell, this ENE pulse with decent period and light wind is a genuine gem. Water temp is 80°, pretty normal for the time of year. Get amongst it.

Later on, into the second week, there’s a flicker of potential around Sunday the 10th of August when a very long-period SSW groundswell rolls in (18 seconds, 2ft). That kind of period at a reef break like Number Fours can produce some real clean lines, but the size is tiny. The wind is still moderate, so it’s worth a look if you’re desperate, but don’t expect anything epic. The rest of that week is dominated by lumpy, onshore energy from the ENE, so keep your expectations in check.

Overall, the best bet is locked in for Tuesday the 5th of August. Don’t sleep on it.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Fri afternoon, min 25°C on Fri night). Winds decreasing (strong winds from the ENE on Fri night, moderate winds from the NE by Sun night).

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Wed morning, min 24°C on Mon night). Mainly fresh winds.

Fri
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
1
1
1
0
1
2
0
2
2
3
2
2
2
1
0
0
0
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
E
8
3
E
8
3
E
8
2.5
ENE
8
2.5
ENE
8
2.4
ENE
8
2.2
ENE
8
2.1
ENE
8
1.7
ENE
8
1.5
ENE
8
1.6
ENE
12
1.5
ENE
11
1.4
ENE
11
1.3
ENE
10
1.2
ENE
9
1.1
ENE
9
1.1
ENE
8
1.1
ENE
8
1.2
ENE
7
0.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
765
1029
1234
871
956
801
662
592
394
321
713
515
415
314
232
184
176
163
147
102
Wind (km/h)
40
ENE
45
ENE
45
ENE
40
ENE
40
ENE
35
ENE
35
ENE
30
ENE
25
ENE
30
NE
20
ENE
15
ENE
15
NE
15
ENE
15
ENE
15
NE
15
ENE
30
ENE
30
ENE
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
High Tide
5:26PM0.64m
5:57AM0.34m
5:55PM0.59m
6:49AM0.38m
6:24PM0.52m
7:47AM0.42m
6:55PM0.44m
8:56AM0.47m
7:27PM0.36m
10:11AM0.53m
8:07PM0.29m
11:24AM0.60m
9:30PM0.22m
Low Tide
00:22AM0.06m
11:14AM0.11m
00:48AM0.05m
12:06PM0.16m
1:15AM0.04m
1:14PM0.22m
1:46AM0.04m
2:52PM0.27m
2:23AM0.03m
5:19PM0.27m
3:10AM0.03m
7:39PM0.21m
4:08AM0.02m
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:05
6:05
6:05
6:05
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:09
7:09
7:08
7:08
7:07
7:07
7:07
 mm
Temp °C
26
25
26
26
25
26
26
25
25
26
25
26
26
25
27
26
26
26
26
26
Feels °C
22
21
21
22
22
22
22
22
24
24
24
27
27
26
29
29
28
26
24
26
  • 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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