Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 7 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
27.2° C
0.6° 

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 11 Aug 2026:

  • Most powerful swell: Sunday 16 Aug, 8PM (local time) - 8ft (2.4m), 11s period, ENE swell with 1,292 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 2.4m 11s and forecast to arrive on Sunday (Aug 16) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 12s period and expected on Thursday (Aug 13) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Sun 16th Aug)8ft (2.4m) 11s

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


The Lowdown

What’s up crew, Rusty here. Can’t lie, the next couple of weeks are looking pretty shabby. We’ve got a run of messy, low quality surf, and nothing is lining up to get your pulse racing.

The dry spell kicks off from Monday the 10th with an ENE windswell that’s just not doing anything for us. Small, short period, and onshore wind. It’s not a day to bring a good board, it’s a day to wait.

Tuesday and Wednesday remain much the same, with a hopeful south groundswell flaring up but then immediately crashing down due to longer periods but no actual size. The energy readings are in the 800-900 range, but the height is a measly one meter. It’s all wash, no go.

Thursday brings a touch more size but is still messy, and Friday is the same story, just a small short-period ENE swell. By the 15th, things get bigger but are still very poor. We’re looking at a 2.2m wave in the afternoon, but the period is a brisk 9 seconds and the wind is cross-off. It’s going to be a walled-up mess.

Then we get to Sunday, where the wind is howling onshore at 65 km/h. It’s big, 2.4m, but it’s onshore junk. This is a wash. The energy for these two days is strong, around 1100-1485, but the quality is non-existent.

Monday the 17th is the only day that might have a bit of life, but it's still snappy. The ENE swell with a period of 11 seconds and the sea is around 2.3m with light cross-swelling. The energy is high, but those long period swells often just barrel of the reef with no shape. It’s a busy, bumpy day, not a satisfying wave.

After that, we drop off a cliff. Tuesday to Sunday of the following week looks small and weak. Most days are a struggle to get over 1.1m, and the energy fades away. There will be some small south pulses from the 18th-21st, but they’re short-lived and with zero push.

The 22nd sees a little pulse begin to form but again, the period is tiny and it's more of the same thing. We get another small spike on the 24th but again it's not something to get excited about.

Finally, the late forecast for the 25th shows a more promising south over the reef with a nice 17-second period. The energy gets a bit of legs, but it’s still in the marginal zone. It’s window dressing.

The water temp is 27°, which is about 0.6° above average. Nothing to complain about there.

So, there you have it. If I were to pick days to even look at the ocean, it’s Monday the 17th and possibly the 25th, but both are far from being good. With the ENE wind being the constant, this barren spell seems like it’ll last for a few more days. We’ll just have to ride it out and dust off the shortboard for a while.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Heavy rain (total 35mm), heaviest during Sat night. Warm (max 27°C on Thu morning, min 25°C on Thu night). Winds increasing (fresh winds from the NE on Thu morning, near gales from the NNW by Sat night).

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
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
1
0
1
1
1
1
1
1
1
0
0
0
1
0
1
0
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)
1.4
ENE
8
1.3
ENE
8
0.6
SSW
15
1.3
ENE
7
0.8
SSW
14
0.6
S
20
0.9
S
18
0.9
S
18
1
S
16
1
S
16
1.2
S
15
1.1
S
15
1
S
14
1.9
ENE
7
2.3
ENE
7
2.1
ENE
8
2.2
ENE
9
2.4
ENE
9
2.4
ENE
10
2.4
ENE
10
2.3
ENE
11
Wave Graph
Metric surfscale
Energy kJ
210
176
186
181
269
276
509
498
520
501
662
537
416
375
547
588
831
940
1156
1198
1146
Wind (km/h)
30
ENE
30
ENE
25
ENE
25
ENE
30
ENE
25
ENE
30
ENE
30
ENE
30
ENE
35
NE
35
ENE
35
ENE
35
NE
35
ENE
35
NE
40
NE
40
NNE
55
NNW
65
S
40
SSE
20
SSE
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
on
on
cross-on
High Tide
2:54PM0.80m
2:55AM0.26m
3:35PM0.79m
3:43AM0.31m
4:13PM0.75m
4:30AM0.36m
4:48PM0.69m
5:17AM0.40m
5:22PM0.62m
6:06AM0.44m
5:54PM0.53m
6:57AM0.47m
6:24PM0.45m
Low Tide
10:10PM0.06m
8:15AM-0.02m
10:40PM0.05m
9:08AM-0.00m
11:08PM0.04m
9:58AM0.03m
11:36PM0.04m
10:49AM0.08m
00:03AM0.04m
11:43AM0.14m
00:30AM0.05m
12:43PM0.20m
00:58AM0.06m
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
heavy rain
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:04
7:02
7:02
7:01
7:00
7:00
 mm
35
5
11
2
Temp °C
26
27
26
26
26
25
26
26
25
27
27
25
26
26
25
26
27
26
26
26
26
Feels °C
26
25
26
25
24
23
24
24
23
24
24
23
23
23
23
24
24
24
26
22
25
  • 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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