Surf Forecast Surf Report

Ko Samui surfForecast / Gulf of Thailand / Thailand

information circle12 Day Weather and Surf, issued 12 pm Monday 31 Mar 2025 +07
Forecast update in hr  min  s Forecast update imminent
Ko Samui surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Ko Samui sea temperature is
30.0° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Ko Samui this week:

The most powerful waves expected at Ko Samui in the next 12 days are 0.6m 7s and forecast to arrive on Friday (Apr 04) at 4AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 1s period and expected on Tuesday (Apr 01) at 4PM.

Wave TypeTime (+07) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 4AM (Fri 4th Apr)2ft (0.6m) 7s

Table - best surf conditions forecast for Ko Samui over the next 12 days.

Updates in  hr  min  s Forecast update imminent
Monday
31
Tuesday
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.3
SE
0.2
ESE
0.1
E
0.3
ESE
0.1
E
0.2
E
0.3
NE
0.2
ESE
0.4
ESE
0.4
ESE
0.5
ESE
0.5
ESE
0.4
ESE
0.4
SE
0.5
SE
0.4
SE
0.4
SE
0.3
SE
0.3
SE
0.3
SE
0.3
SE
0.4
SE
0.4
SE
0.4
SE
0.3
SE
0.7
ESE
0.5
ESE
0.1
E
0.1
E
0.2
ESE
0.1
SE
0.1
E
0.1
E
0.1
E
0.3
WNW
0.3
W
Period(s) (?)224434266367333332222333355544444422
Wave
Graph
(?)Metric surfscale
Energy (?)10040114133212632422111132212214002100000
Wind
(km/h)
15
SE
15
SE
20
SSE
10
SSE
20
S
5
SW
30
NE
20
E
25
ESE
35
ESE
25
ESE
30
SE
30
SE
25
SE
20
SSE
15
SSE
15
SE
15
SE
15
SE
15
SE
25
SSE
25
SSE
25
SE
25
SE
15
SE
15
ESE
15
SE
10
SSE
10
ENE
15
S
15
W
5
NW
20
W
15
WNW
5
NW
25
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
ononcross-
on
cross-
on
crossglasscrosscross-
on
onononononcross-
on
cross-
on
cross-
on
oncross-
on
cross-
on
oncross-
on
cross-
on
oncross-
on
cross-
on
oncross-
on
cross-
on
cross-
on
cross-
on
offglassoffoffglassoff
High Tide
/ height (m)
1:26PM
0.57
12:41AM
1.12
1:15AM
1.30
1:56AM
1.41
2:43AM
1.45
3:33AM
1.42
4:26AM
1.35
5:21AM
1.26
6:18AM
1.15
7:15AM
1.04
8:16AM
0.92
9:21AM
0.81
11:37PM
0.74
Low Tide
/ height (m)
4:28PM
0.54
9:35AM
0.27
11:03AM
0.17
12:35PM
0.11
2:14PM
0.09
3:42PM
0.10
4:37PM
0.13
5:05PM
0.19
5:12PM
0.26
5:10PM
0.33
5:04PM
0.40
4:53PM
0.46
Monday
31
Tuesday
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Sunrise6:18--6:16--6:16--6:16--6:15--6:15--6:13--6:13--6:13--6:13--6:11--6:11--
Sunset-6:30--6:30--6:30--6:30--6:30--6:30--6:30--6:29--6:29--6:29--6:29--6:29-
part cloudclearrain showersthunderstorm thunderstorm heavy rainthunderstorm mod rainthunderstorm thunderstorm thunderstorm thunderstorm part cloudclearrain showerspart cloudclearrain showersclearclearclearthunderstorm clearclearclearclearclearclearclearclearrain showersrain showersclearclearpart cloudclear
Rain (mm)
--7421213813537--3--4---1--------11----
Temp. °C282828262627252626272828282928282928282928292929282928282928282930283029
Feels °C (?)303030272731242828262828273029303230303129303030303130313230313432303229

Short Range Forecast: Heavy rain (total 59mm), heaviest during Tue night. Warm (max 28°C on Mon morning, min 25°C on Tue morning). Winds increasing (calm on Tue night, fresh winds from the E by Wed night).

Days 3-6 Weather Summary Heavy rain (total 22mm), heaviest during Thu morning. Warm (max 29°C on Fri afternoon, min 27°C on Thu morning). Winds decreasing (fresh winds from the ESE on Thu morning, light winds from the SE by Sat afternoon).

Days 6-9 Weather Summary Some drizzle, heaviest during Mon morning. Warm (max 29°C on Sun afternoon, min 28°C on Sun morning). Wind will be generally light.

Long Range Forecast: Light rain (total 2mm), mostly falling on Thu morning. Warm (max 30°C on Thu night, min 28°C on Wed morning). Wind will be generally light.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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Information about the Ko Samui Surf forecast

The above surf forecast table for Ko Samui provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Ko Samui can be found by selecting the local surf guide option on the grey menu. Our Ko Samui 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 (Ko Samui) 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 Ko Samui 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.

Ko Samui is 14 km (9 miles) from the city of Ko Samui. If you plan a holiday in Gulf of Thailand, look for hotels and other accommodation in Ko Samui. Ko Samui has rooms for a wide range of budgets as well as car hire and transport links.

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