In Betweens Surf Break

Lat Long: 21.28° N 157.84° W

In Betweens Surf Forecast and Surf Report

Issued: 1 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's In Betweens sea temperature is
27.0°C
0.1° 

In Betweens surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


In Betweens surf forecast from 1 Sep 2026:

  • Best quality surf: Monday 7 Sep, 5PM (local time) - 7.5ft (2.3m), 11s period, ENE swell with offshore winds.
  • Most powerful swell: Saturday 5 Sep, 11AM (local time) - 8ft (2.4m), 13s period, ENE swell with 1,901 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 5PM (local time) - 7.5ft (2.3m), 11s period with ENE swell.

Best Forecast Surf Conditions for In Betweens this week:

The surf forecast for In Betweens over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 5PM. The primary swell is predicted to be 2.3m and 11s period with a secondary swell of 1.1m and 17s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at In Betweens in the next 16 days are 2.4m 13s and forecast to arrive on Saturday (Sep 05) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Mon 7th Sep)7.5ft (2.3m) 11s
Best Surf 5PM (Mon 7th Sep)7.5ft (2.3m) 11s
Most Powerful11AM (Sat 5th Sep)8ft (2.4m) 13s

Table - best surf conditions forecast for In Betweens over the next 16 days.


The Lowdown

Alright, Rusty here again. Let's break down what's coming at In-Betweens over the next couple of weeks.

Right out of the gate, the first week is a bit of a slog. There’s a steady supply of ENE windswell, pushing waves around chest to head-high most days, with wave energy climbing into the strong range. But the wind is blowing a stiff cross-offshore breeze from the same ENE direction, which messes up the surface. The water is a normal 81°F for this time of year. It’s going to be bumpy and hard to get a clean ride, and the quality is poor until we get a change.

That change finally comes on Monday the 7th of September. The wind shifts to a light offshore breeze from the north, barely 3 mph, and the swell is still a solid 8ft from the ENE with a 12-second period. This is the real standout. The wave energy is very strong, and with that glassy, clean surface, In-Betweens will have excellent lines for experienced surfers. This is the day to mark on the calendar.

After that, it gets mixed up. Tuesday the 8th sees a quick change: a smaller SSW groundswell with a very long 15-second period, but the wind turns onshore, ruining the shape. That long period is better for a point or reef, not for this spot with onshore wind, so it’s best to sit that one out.

From Wednesday the 9th, we’re back to that ENE windswell pattern with the same cross-offshore winds and head-high waves, but nothing exciting. The energy fades through the second week, and by the 11th and 12th, the swell drops below 5ft with light winds, but the waves are small and weak, hardly worth suiting up.

The very tail end, around Sunday the 13th into Tuesday the 15th, we get another shot of very long-period SSW groundswell (15-18 seconds), but it’s tiny – only about 2ft. With a 15 mph cross-offshore wind on the final day, it’s a total washout. That long period at that size just won’t produce anything rideable here.

So, the only true standout is Monday the 7th of September. That’s your window for clean, powerful waves with light offshore wind. The rest of the period is mostly a bust due to persistent onshore or cross-offshore winds, or just a lack of size. There’s a long stretch of poor to marginal days in the second week, so keep your expectations in check until that Monday.

Signing off,
Rusty.

Short Range Forecast

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

Days 5-7 Weather Summary

Some drizzle, heaviest during Sun morning. Warm (max 27°C on Sat afternoon, min 25°C on Thu afternoon). Winds decreasing (strong winds from the ENE on Thu afternoon, moderate winds from the ENE by Sat night).

Mon
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
1
1
1
0
1
1
1
1
1
1
1
2
2
2
3
2
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
ENE
8
2
ENE
8
2
ENE
8
1.9
ENE
8
2
ENE
8
2.1
ENE
8
2.3
ENE
8
3
ENE
8
2.5
E
8
2.4
ENE
8
3
ENE
8
2.5
ENE
8
2
ENE
8
2.3
ENE
13
2.4
ENE
13
2.3
ENE
13
2.3
ENE
13
2.3
ENE
13
2.3
ENE
13
2.3
ENE
12
Wave Graph
Metric surfscale
Energy kJ
428
439
475
453
475
494
620
1029
877
640
1003
893
474
1713
1901
1697
1697
1723
1610
1493
Wind (km/h)
35
ENE
30
ENE
30
ENE
35
ENE
35
ENE
40
ENE
40
ENE
40
ENE
45
ENE
45
ENE
40
ENE
45
ENE
40
ENE
35
ENE
30
ENE
25
ENE
20
ENE
30
ENE
35
ENE
25
NE
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
5:48PM0.44m
7:14AM0.56m
6:20PM0.36m
8:21AM0.59m
6:54PM0.28m
9:39AM0.62m
7:57PM0.22m
10:58AM0.66m
10:35PM0.19m
12:05PM0.69m
00:18AM0.21m
1:00PM0.73m
1:21AM0.26m
Low Tide
00:10AM0.05m
1:40PM0.23m
00:43AM0.05m
3:38PM0.25m
1:25AM0.06m
6:22PM0.22m
2:24AM0.08m
7:30PM0.17m
3:46AM0.09m
8:03PM0.13m
5:11AM0.08m
8:31PM0.10m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
thunderstorm
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:15
6:15
6:15
6:15
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:47
6:46
6:45
6:45
6:44
6:43
6:43
 mm
1
Temp °C
26
25
26
27
26
26
26
26
26
26
25
25
26
25
26
27
26
27
27
26
Feels °C
22
22
24
25
24
24
23
23
22
21
21
20
21
21
24
25
26
26
25
25
  • 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 In Betweens Surf forecast

The above surf forecast table for In Betweens provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at In Betweens can be found by selecting the local surf guide option on the grey menu. Our In Betweens 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 (In Betweens) 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 In Betweens 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.

In Betweens is 4 km (2 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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