Nai Harn Beach Surf Break

Lat Long: 7.78° N 98.30° E

Nai Harn Beach Surf Forecast and Surf Report

Issued: 6 pm 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's Nai Harn Beach sea temperature is
30.2° 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 30 Jul 2026:

  • Best quality surf: Tuesday 4 Aug, 4PM (local time) - 6ft (1.9m), 9s period, WSW swell with glassy winds.
  • Most powerful swell: Wednesday 5 Aug, 7AM (local time) - 8ft (2.4m), 11s period, WSW swell with 1,244 kJ wave energy.
  • Next surfable swell (1★+): Saturday 1 Aug, 10PM (local time) - 1ft (0.3m), 16s period with WSW swell.

Best Forecast Surf Conditions for Nai Harn Beach this week:

The surf forecast for Nai Harn Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 01) at 10PM. The primary swell is predicted to be 0.3m and 16s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Nai Harn Beach in the next 16 days are 2.4m 11s and forecast to arrive on Wednesday (Aug 05) at 7AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 8s period and expected on Friday (Jul 31) at 1AM.

Wave TypeTime (+07) & Date Wave Height & Period
Next good surf (1 star+)10PM (Sat 1st Aug)1ft (0.3m) 16s
Best Surf 4PM (Tue 4th Aug)6ft (1.9m) 9s
Most Powerful 7AM (Wed 5th Aug)8ft (2.4m) 11s

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


The Lowdown

Alright, I’m looking at Nai Harn Beach here, and to be honest, we’ve got a long stretch of nothing before anything even remotely interesting shows up. This is one of those waits where you’ve just got to sit on the sand and watch for a bit.

We’re starting off with a total flat spell. From Thursday the 30th of July right through to Monday the 3rd of August, it’s tiny – we’re talking 0.3 ft to 0.7 ft of swell with hardly any energy behind it (combined energy is only between 8 and 37). Winds are mostly light and cross or onshore, with a few glassy moments, but there’s just no wave to ride. It’s a dead zone, mate.

Then on Tuesday the 4th of August, things finally wake up. The morning starts rough with onshore winds and a bumpy 6 ft swell out of the WSW, period 8 seconds. The combined energy jumps to 485, but the wind is messy. But then… Tuesday afternoon is our one true standout. The swell holds at 6 ft from the WSW, period lifts to 9 seconds, and the wind goes glassy. Combined energy hits 721 – that’s moderate energy, but clean. The water temp is 86°, which is about a degree and a half warmer than normal for this time of year, so it’s a little bath. That Tuesday afternoon is the best on offer: clean, glassy, and rideable for intermediates. The swell is right in the sweet spot for Nai Harn (optimum from the W). Crowds are possible here, so get out early.

Now, Wednesday the 5th of August gets bigger but uglier. The swell pushes 8 ft in the morning and 8 ft in the afternoon, both out of the WSW/W. That’s too big for beginners and borderline for most. The combined energy is 994 and 885, which is solid, but the wind is onshore both sessions and the report flags marginal surf conditions. It’s going to be lumpy and hard work.

From Thursday the 6th of August right through to Friday the 14th of August, it’s a mess. Swell hangs around 6 ft to 7 ft, mostly from the W, but the wind is relentless – 12 mph to 28 mph onshore or strong cross-onshore. Combined energy fades from 810 down to 488, then drops to almost nothing by the 12th and 13th. The surf is blown out and choppy, with no quality. For a beach and reef setup like this, with that much wind and swell, it’s honestly looking more interesting for kite surfing than paddle surfing through most of that second week. There’s a brief window on the 11th of August morning with a 7 ft WSW swell and 615 energy, but it’s still cross-on and ugly.

Our one real highlight is Tuesday 4th of August afternoon at Nai Harn Beach. That’s your best bet if you’re patient. The rest is either flat, blown out, or too big and messy.

Stay salty,
Rusty

Short Range Forecast

Moderate rain (total 12mm), heaviest on Thu afternoon. Warm (max 29°C on Sat afternoon, min 27°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 19mm), heaviest on Mon night. Warm (max 29°C on Sun afternoon, min 28°C on Sun night). Wind will be generally light.

Thu
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
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
1
0
0
0
0
0
0
0
3
3
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.1
W
21
0.1
W
20
0.2
WSW
18
0.2
WSW
18
0.2
WSW
18
0.2
WSW
16
0.2
WSW
16
0.3
WSW
16
0.2
WSW
16
0.2
WSW
15
0.2
WSW
16
0.2
WSW
16
0.2
W
8
1.4
W
6
1.9
WSW
8
1.9
WSW
9
2
W
11
2.5
WSW
9
2.3
W
9
2.2
W
8
Wave Graph
Metric surfscale
Energy kJ
8
7
33
31
30
26
25
51
24
23
24
24
4
148
485
518
901
994
885
698
Wind (km/h)
10
NW
20
NW
10
W
5
W
5
SSW
0
WSW
10
WSW
5
WSW
5
WSW
10
SW
10
W
10
W
15
W
10
W
15
WSW
5
WSW
10
SSW
15
SW
15
WSW
20
WSW
Wind State
cross
cross
cross-on
glassy
glassy
glassy
on
glassy
glassy
on
cross-on
cross-on
cross-on
cross-on
on
glassy
on
on
on
cross-on
High Tide
11:28PM1.63m
11:33AM1.95m
11:58PM1.69m
12:02PM1.95m
00:29AM1.73m
12:32PM1.91m
1:01AM1.75m
1:04PM1.83m
1:37AM1.74m
1:39PM1.71m
2:16AM1.69m
2:20PM1.57m
3:05AM1.62m
Low Tide
5:27PM0.14m
5:19AM0.25m
5:55PM0.09m
5:51AM0.23m
6:23PM0.07m
6:24AM0.23m
6:52PM0.07m
6:59AM0.27m
7:22PM0.11m
7:37AM0.34m
7:56PM0.19m
8:22AM0.44m
8:36PM0.30m
thunderstorm
thunderstorm
thunderstorm
part cloud
rain showers
part cloud
part cloud
rain showers
thunderstorm
clear
rain showers
thunderstorm
thunderstorm
rain showers
rain showers
part cloud
rain showers
thunderstorm
thunderstorm
thunderstorm
<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
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:46
6:45
6:45
6:45
6:45
6:45
 mm
2
4
2
2
1
1
1
2
1
6
2
3
4
6
4
Temp °C
28
27
28
28
28
28
29
29
29
29
29
28
29
28
29
29
29
29
28
28
Feels °C
31
28
32
32
32
32
32
33
33
32
32
31
31
29
32
33
33
31
31
30
  • 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
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Nai Harn Beach:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nai Harn Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest