Surf Forecasts:
Number Fours surf forecast from 27 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 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 1.1m 17s and forecast to arrive on Thursday (Aug 27) 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 1.6m 6s period and expected on Friday (Aug 28) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
G’day, surfers. Rusty here with a look at the next couple of weeks at Number Fours.
Straight up, I’m not gonna lie to you – this is a tough run. The forecast is littered with marginal surf or poor conditions, so there’s no standout classic session on the horizon. The water’s sitting at 27°, which is bang on average for this time of year, so no complaints there.
The whole first week is a bit of a write-off. Wednesday the 26th kicks off with small 2ft SSW swell and a fresh 35 km/h cross-off breeze, but the energy’s just not there with a combined energy reading of 578. It’s clean, but the scores are terrible. That pattern sticks around through Thursday and Friday – the swell nudges up to 4ft on Thursday morning with a 17-second period (long period groundswell mind you), but again, the zone is getting hammered by a fresh breeze, and the forecast says it’s marginal. Saturday the 29th is a mess – 6ft of short-period ENE windswell (7 seconds) with a combined energy of 568, but it’s coming in with strong winds and rated poor. Not the day to paddle out.
Sunday the 30th and Monday the 31st are more of the same: 5ft to 6ft of short-period junk, clean but poor. The only flicker of improvement comes on Tuesday the 1st of September. The morning shows 5ft of ENE swell with a period of 9 seconds and a moderate breeze, and the combined energy jumps to 754. It’s still marginal, but the score is a 2, which is the best we’ve seen. Still, I wouldn’t call it a standout.
The second week stays pretty average. Wednesday the 2nd and Thursday the 3rd deliver consistent 5ft to 6ft ENE swell, clean with moderate to fresh breezes, but the quality is always described as marginal. The best chance might be Friday the 5th of September. The morning shows 4ft of east swell at 11 seconds, a gentle east breeze giving a clean cross-shore, and a combined energy of 575. That’s about as good as it gets in this forecast – clean, modest, but not small. Still, it’s a marginal call.
The very end of the run, around the 7th of September, sees a south-southwest swell of 3ft with a very long 16-second period and a combined energy of 1174 on Monday morning – that’s a serious energy spike. But the wind is a fresh 30 km/h cross-off, and the forecast still says marginal. A long-period groundswell like that can make a reef break like Number Fours shine, but it’s a gamble with the wind.
Honestly, this is a stretch where you’d be better off watching the horizon and waiting for a change. The pattern is weak and inconsistent, and the forecasts can shift, but right now, there’s no real stand-out day. If you’re desperate, the 5th of September morning is your best bet.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Wed afternoon, min 25°C on Wed night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sat afternoon, min 25°C on Sat night). Mainly strong winds. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | ||||||||||||||||||||
Wave Height (m) Direction Period (s) | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 |
Wave Graph | ||||||||||||||||||||
307 | 351 | 716 | 427 | 482 | 260 | 329 | 253 | 252 | 265 | 326 | 229 | 217 | 229 | 286 | 458 | 444 | 489 | 444 | 444 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | 3:24PM0.68m | 3:31AM0.37m | 3:53PM0.66m | 4:08AM0.41m | 4:20PM0.62m | 4:47AM0.46m | 4:49PM0.57m | 5:30AM0.50m | 5:18PM0.51m | 6:18AM0.53m | 5:48PM0.44m | 7:14AM0.56m | 6:20PM0.36m | |||||||
Low Tide | 10:12PM0.10m | 9:05AM0.06m | 10:32PM0.08m | 9:46AM0.07m | 10:54PM0.07m | 10:31AM0.10m | 11:17PM0.05m | 11:22AM0.14m | 11:42PM0.05m | 12:22PM0.19m | 00:10AM0.05m | 1:40PM0.23m | 00:43AM0.05m | |||||||
— | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 |
Feels °C | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 23 | 24 | 24 | 25 | 26 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 13 | E 12 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 10 | SSW 18 | S 18 | S 17 |
307 | 351 | 716 | 427 | 482 | 260 | 329 | 229 | 126 | 110 | 102 | 171 | 100 | 199 | 144 | 138 | 51 | 329 | 230 | 273 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | N 8 | SSW 12 | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | E 12 | E 11 | SSW 16 | S 11 | S 11 | S 11 | S 19 | S 10 | S 12 | S 10 |
135 | 137 | 6 | 47 | 10 | 78 | 109 | 146 | 85 | 89 | 106 | 65 | 162 | 59 | 57 | 82 | 192 | 48 | 75 | 31 | |
Swell 3 Height (m) Direction Period (s) | W 10 | SSW 16 | NW 9 | W 9 | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | SSW 12 | E 11 | ENE 10 | S 21 | SSW 19 | SW 14 | SSW 14 | SW 14 | SW 14 |
8 | 50 | 3 | 7 | 24 | 22 | 36 | 56 | 89 | 75 | 186 | 46 | 61 | 37 | 34 | 122 | 54 | 80 | 51 | 52 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 |
160 | 206 | 182 | 151 | 131 | 150 | 160 | 253 | 252 | 265 | 326 | 229 | 217 | 229 | 286 | 458 | 444 | 489 | 444 | 444 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 39 | 39 | 32 | 32 | 2 | 31 | 44 | 31 | 39 | 46 | 32 | 39 | 39 | 32 | 31 | 42 | 1 | 31 | 33 | 31 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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.











