Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 am 18 Oct 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
27.0°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 18 Oct 2026:

  • Best quality surf: Friday 23 Oct, 2AM (local time) - 4ft (1.2m), 8s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 20 Oct, 5PM (local time) - 8ft (2.5m), 8s period, ENE swell with 711 kJ wave energy.
  • Next surfable swell (1★+): Friday 23 Oct, 2AM (local time) - 4ft (1.2m), 8s 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 Friday (Oct 23) at 2AM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.4m and 13s. 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 2.5m 8s and forecast to arrive on Tuesday (Oct 20) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Thursday (Oct 22) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Fri 23rd Oct)4ft (1.2m) 8s
Best Surf 2AM (Fri 23rd Oct)4ft (1.2m) 8s
Most Powerful 5PM (Tue 20th Oct)8ft (2.5m) 8s

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


Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Wed afternoon, min 24°C on Wed night). Winds decreasing (fresh winds from the ENE on Wed morning, light winds from the ENE by Fri morning).

Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
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
0
0
0
1
1
0
1
0
0
2
2
1
2
1
2
2
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
7
2.2
ENE
7
2.5
ENE
8
2.2
ENE
8
2
ENE
8
2.4
ENE
8
2.1
ENE
8
2.5
ENE
8
2.3
ENE
8
2.1
ENE
8
1.6
ENE
8
1.5
ENE
8
0.8
E
8
0.4
SW
14
1.2
ENE
8
1.1
ENE
8
1
ENE
8
1
ENE
8
0.5
SSW
13
0.8
SSW
12
0.6
SSW
16
Wave Graph
Metric surfscale
Energy kJ
444
471
675
555
464
655
495
711
589
481
296
263
72
47
174
149
113
119
95
205
208
Wind (km/h)
40
ENE
40
ENE
40
ENE
40
ENE
40
ENE
35
ENE
40
ENE
40
ENE
35
ENE
35
ENE
35
ENE
20
ENE
20
ENE
20
NE
15
NE
15
ENE
15
NE
10
NNE
10
ENE
10
N
15
NNE
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
off
cross-off
High Tide
10:27AM0.57m
00:02AM0.25m
11:21AM0.56m
00:39AM0.31m
12:05PM0.55m
1:10AM0.37m
12:44PM0.54m
1:42AM0.45m
1:19PM0.51m
2:15AM0.52m
1:54PM0.48m
2:50AM0.60m
2:29PM0.43m
3:27AM0.67m
Low Tide
6:32PM0.13m
3:48AM0.21m
6:52PM0.11m
5:16AM0.20m
7:10PM0.09m
6:23AM0.19m
7:28PM0.07m
7:20AM0.16m
7:47PM0.04m
8:13AM0.15m
8:09PM0.02m
9:06AM0.13m
8:33PM-0.01m
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
—
—
6:28
—
—
6:28
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—
6:28
—
—
6:28
—
—
6:30
—
—
6:30
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
6:04
—
—
6:02
—
—
6:02
—
—
6:01
—
—
6:00
—
—
6:00
—
—
6:00
—
 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
25
25
25
25
25
25
25
25
25
25
26
25
26
26
25
26
26
25
25
26
25
Feels °C
21
21
21
21
21
21
21
21
21
21
23
22
25
24
25
26
26
26
26
27
26
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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