Nai Harn Beach Surf Break

Lat Long: 7.78° N 98.30° E

Nai Harn Beach Surf Forecast and Surf Report

Issued: 12 am 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nai Harn Beach sea temperature is
30.1° C
1.0° 

Nai Harn Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Nai Harn Beach surf forecast from 6 Aug 2026:

  • Most powerful swell: Friday 7 Aug, 4AM (local time) - 8ft (2.5m), 9s period, W swell with 930 kJ wave energy.

Best Forecast Surf Conditions for Nai Harn Beach this week:

The most powerful waves expected at Nai Harn Beach in the next 16 days are 2.5m 9s and forecast to arrive on Friday (Aug 07) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 8s period and expected on Wednesday (Aug 12) at 4PM.

Wave TypeTime (+07) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 4AM (Fri 7th Aug)8ft (2.5m) 9s

Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.


The Lowdown

Ah mate, it's Rusty here. Let me level with you – the next sixteen days are looking pretty grim for a proper paddle out at Nai Harn Beach. I've been staring at this forecast and, honestly, there isn't a single window I'd call a good surf session.

Right out of the gate, Friday the 7th has swell on the way, about 7ft of it out of the west, and there's some real energy behind it – we're talking a combined energy reading of 694, which is solid. But the wind is howling from the WSW at 22 mph and it's all cross-onshore, which is going to chop it right up. Blowing up the sand and making it messy. This is going to look more like a washing machine than clean surf. This is a beach and reef setup, but with conditions like this, the whole thing looks like it'd be more fun for the kite surfers than us paddle surfers.

That pattern just doesn't let up through the weekend and into early next week. We're looking at that west-northwest wind sticking around, with cross-onshore conditions keeping everything lumpy. Sunday the 9th has a similar 5ft west swell, but it's still junky. The swell actually dips to nearly nothing on Wednesday the 12th and Thursday the 13th, with just a foot of swell and those long-period swells (16-18 seconds) that are barely registering – energy levels drop to as low as 5, so there's literally nothing to ride even if the wind was perfect, which it isn't.

Now, the middle of the month has us seeing red. The wind is forecast to ramp up, especially around Wednesday the 19th, with WSW winds hitting 25 mph. We'll see a 6-7ft west swell, but it's going to be accompanied by a strong cross-onshore breeze making everything completely messy. That's not a surf forecast; that's a "stay on the beach and have a cold one" forecast.

There are more pulses of west swell (around 7ft) late in the run, from the 20th through to the 22nd, but the story stays the same: cross-onshore winds, rough conditions, and a whole lot of close-outs.

Here's the thing about Nai Harn – it's listed as inconsistent, so blank stretches are part of the deal around here. I know this forecast paints a bleak picture, but these conditions can shift. We just need that wind to swing offshore and all this west swell could turn into something magical. Until then, I'd keep the board in the car and maybe watch the horizon. Hang tight, lads.

This is Rusty, signing off.

Short Range Forecast

Light rain (total 9mm), mostly falling on Fri afternoon. Warm (max 29°C on Thu night, min 28°C on Thu night). Mainly strong winds.

Days 4-6 Weather Summary

Moderate rain (total 17mm), heaviest on Tue morning. Warm (max 29°C on Sun night, min 28°C on Sun night). Mainly strong winds.

Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
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
0
0
0
0
0
0
0
0
0
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)
2.1
W
9
1.7
W
8
1.6
W
8
1.7
W
8
1.3
W
7
1.3
W
8
1.5
W
8
1.5
W
8
1.5
W
8
1.9
W
8
1.6
W
8
1.7
W
8
1.9
W
8
1.6
W
8
1.6
W
8
1.7
W
8
0.1
SW
18
0.8
W
8
0.1
W
17
0.1
W
16
0.1
W
16
Wave Graph
Metric surfscale
Energy kJ
668
403
318
332
183
217
268
275
297
454
329
372
477
329
305
336
13
76
12
5
5
Wind (km/h)
35
WSW
30
WSW
30
W
30
WSW
25
WSW
25
WSW
25
WSW
25
W
30
W
30
W
30
W
30
W
35
W
25
W
30
W
30
W
25
W
25
W
30
W
25
W
25
W
Wind State
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
4:10AM1.54m
4:30PM1.24m
5:41AM1.50m
6:30PM1.19m
7:19AM1.58m
8:11PM1.29m
8:32AM1.73m
9:16PM1.44m
9:27AM1.88m
10:04PM1.60m
10:12AM2.01m
10:45PM1.72m
10:52AM2.08m
11:23PM1.81m
Low Tide
10:40AM0.65m
10:43PM0.57m
12:34PM0.64m
00:28AM0.61m
2:09PM0.50m
2:00AM0.52m
3:12PM0.32m
3:04AM0.39m
3:59PM0.15m
3:54AM0.26m
4:40PM0.02m
4:38AM0.17m
5:16PM-0.06m
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thunderstorm
mod rain
thunderstorm
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<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:18
6:18
6:18
6:18
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:44
6:44
6:44
6:43
6:43
 mm
3
3
1
1
1
1
1
4
6
5
7
9
2
2
Temp °C
29
29
29
29
29
29
29
29
29
29
29
29
28
28
29
29
28
28
28
28
28
Feels °C
28
28
29
29
29
30
30
29
30
29
28
29
26
28
30
29
28
29
28
28
29
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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 Nai Harn Beach Surf forecast

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

Nai Harn Beach is 8 km (5 miles) from the city of Ban Chalong. If you plan a holiday in Phuket, look for hotels and other accommodation in Ban Chalong. Ban Chalong has rooms for a wide range of budgets as well as car hire and transport links.

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