Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 7 pm 19 Oct 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
26.9°C
0.1° 

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 20 Oct 2026:

  • Best quality surf: Thursday 22 Oct, 5AM (local time) - 4.5ft (1.3m), 8s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 20 Oct, 11AM (local time) - 8ft (2.5m), 8s period, ENE swell with 727 kJ wave energy.
  • Next surfable swell (1★+): Thursday 22 Oct, 5AM (local time) - 4.5ft (1.3m), 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 Thursday (Oct 22) at 5AM. The primary swell is predicted to be 1.3m and 8s period with a secondary swell of 0.4m and 14s. 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 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 1.2m 6s period and expected on Saturday (Oct 24) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Thu 22nd Oct)4.5ft (1.3m) 8s
Best Surf 5AM (Thu 22nd Oct)4.5ft (1.3m) 8s
Most Powerful11AM (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 26°C on Thu morning, min 24°C on Mon night). Winds decreasing (strong winds from the ENE on Tue morning, light winds from the ENE by Wed night).

Days 5-7 Weather Summary

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

Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
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
1
1
0
1
0
0
0
0
0
0
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
ENE
8
2.5
ENE
8
2.4
ENE
8
2.3
ENE
8
1.9
ENE
8
1.6
ENE
8
1.4
ENE
8
1.2
ENE
8
1.2
ENE
8
1.2
ENE
8
1.1
ENE
8
1.3
ENE
8
1.2
ENE
7
0.5
S
18
0.8
SSW
14
0.6
S
17
0.6
S
18
0.8
SSW
16
0.7
SSW
16
Wave Graph
Metric surfscale
Energy kJ
672
727
655
574
411
296
226
161
161
154
145
209
157
156
280
200
222
350
266
Wind (km/h)
35
ENE
45
ENE
40
ENE
35
ENE
35
ENE
30
ENE
20
ENE
20
ENE
30
ENE
20
ENE
25
ENE
25
NE
30
ENE
30
ENE
35
ENE
30
ENE
25
ENE
25
ENE
15
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
High Tide
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
3:06PM0.38m
4:08AM0.72m
Low Tide
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
10:00AM0.12m
9:01PM-0.02m
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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6:28
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6:28
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6:28
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6:30
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6:30
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6:30
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<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:02
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6:02
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6:01
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6:00
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6:00
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6:00
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5:59
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 mm
—
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Temp °C
25
25
25
25
25
25
25
26
26
25
25
25
25
25
26
25
25
25
25
Feels °C
21
20
20
20
21
21
22
26
25
23
24
23
24
24
23
24
24
23
23
  • 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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