Reef
both
Level 8/10

Sebatu

South Nias, Indonesia
🪸Sharp reef😮‍💨Hold-downs

Sebatu sits outside Lagundri Bay in South Nias, facing the full Indian Ocean swell window and producing serious big-wave conditions. The wave is for committed big-wave chargers only, with heavy, hollow faces that can exceed 15 feet. Its open-ocean exposure means it picks up every swell that the bay misses, offering a completely different challenge to the point breaks inside Lagundri.

10-Day Forecast
Thu6
69
Good
2.7m@17s
7km/h
Fri7
74
Good
2.7m@16s
4km/h
Sat8
68
Good
2.7m@16s
4km/h
Sun9
58
Fair
2.5m@15s
7km/h
Mon10
54
Fair
2.4m@15s
8km/h
Tue11
59
Fair
3.0m@18s
8km/h
Wed12
60
Fair
2.8m@16s
7km/h
Thu13
56
Fair
2.3m@14s
4km/h
Fri14
69
Good
2.8m@17s
4km/h
Sat15
55
Fair
2.0m@15s
5km/h
5+ days out, less certain

Today's Conditions

Find Flights
Best session: MorningAM 6 km/h · PM 8 km/h · High tide at 9am (0.5m)
Swell
2.7m
SSW(202°)
Score: 15/25
Period
17s
Long period groundswell
Score: 25/25
Wind
7km/h
WNW(299°)
Score: 20/25
Weather
27°C
0.3mm90%
First light 6:00amSunrise 6:30amSunset 6:38pmLast light 7:08pm
Windswell0.1m@1sSecondary1.3mConfidence
100%

Location & Conditions

Loading map...
0°45°90°135°180°225°270°315°NESW
Swell
Wind
Showing forecast for today

Hourly Forecast, Tide & Strike Windows

No ideal tide during daylight todayIdeal tide: high
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
°C
24°
26°
30°
29°
25°
24°
27°
30°
29°
28°
25°
28°
29°
28°
28°
25°
28°
30°
29°
27°
25°
26°
28°
29°
27°
26°
27°
29°
29°
27°
24°
25°
28°
28°
27°
25°
26°
29°
28°
26°
24°
26°
29°
29°
27°
24°
25°
28°
29°
27°
4m2.0
sec
17s
17s
17s
17s
17s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
15s
15s
15s
15s
15s
15s
15s
15s
15s
15s
18s
18s
18s
18s
18s
16s
16s
16s
16s
16s
14s
14s
14s
14s
14s
17s
17s
17s
17s
17s
15s
15s
15s
15s
15s
swell
windkm/h
7g14
5g14
7g26
7g23
9g27
6g10
3g12
3g13
4g16
2g14
3g9
4g14
8g25
5g22
6g16
6g14
8g19
8g24
8g28
7g26
8g16
6g32
11g34
10g32
8g24
7g19
9g22
10g27
9g31
4g31
5g17
6g20
9g24
8g26
5g27
4g8
2g12
5g19
3g21
6g19
3g19
3g19
5g21
4g21
4g20
5g14
2g18
7g24
7g27
5g28
tidem
4:20am0.2m
9:50am0.5m
4:15pm0.1m
5:50am0.3m
11:00am0.4m
5:10pm0.2m
12:54am0.6m
8:00am0.3m
1:00pm0.4m
6:30pm0.2m
2:18am0.7m
9:50am0.2m
3:00pm0.3m
8:15pm0.1m
3:30am0.8m
10:42am0.1m
4:10pm0.4m
9:30pm0.1m
4:23am0.8m
11:22am0.0m
5:04pm0.5m
5:13am0.9m
12:06pm0.0m
5:45pm0.6m
6:00am0.9m
12:36pm0.0m
6:23pm0.7m
6:40am0.9m
1:06pm0.0m
7:02pm0.7m
1:00am0.0m
Ideal tide (from tide preference)Strike windowNight

Tide times today

4:20 am
Low tide - 0.18m
9:50 am
High tide - 0.46m
4:15 pm
Low tide - 0.11m
Times shown in spot-local time.

Strike Score Breakdown

69
Good
Components
Swell Direction14/25
Swell Size15/25
Swell Period25/25
Wind20/25
Raw Score74/100
Adjustments
💨 Gusty Wind-5
Adjusted Score69/100
Confidence
Multiplier×1.00
Final Score69

Plan Your Strike

Return flights to GNS, departing today with a 5-day trip window.

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Swell Requirements

Optimal direction
SW (220°)
Direction range
180° - 260°
Size range
1.5m - 4.6m
Ideal size
3.7m
Height multiplier
1.08×
Ideal period
16s+

Wind Requirements

Optimal direction
N (0°)
Offshore range
330° - 30°

Tide Requirements

Optimal tide
high
Optimal range
1m - 2m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

8/10

Crowd level

5/10

Access: Fly to Gunungsitoli via Medan, drive to south coast

Frequently Asked Questions

What tide is best at Sebatu?

Sebatu works best on a high tide, ideally between 1m and 2m on the local tide chart. The tide chart above shows today’s strike window.

What wind direction is offshore at Sebatu?

Offshore wind at Sebatu blows from the N (0°). Anything in the 330° to 30° range grooms the faces; outside it, expect chop or bumpy conditions.

What swell size and direction work best at Sebatu?

Sebatu wants SW swell (180° to 260°) between 1.5m and 4.6m, with a period of 16s or more for quality waves.

When is the best time of year to surf Sebatu?

The main season at Sebatu is Apr-Oct. SW swell season (Apr-Oct), SE trade winds offshore

How do I get to Sebatu?

Fly into GNS, then allow about 45 minutes by road. Fly to Gunungsitoli via Medan, drive to south coast

What kind of wave is Sebatu?

Sebatu is a reef break, a peak with lefts and rights. Difficulty is rated 8/10.

Best Season

Peak: Apr-Oct

SW swell season (Apr-Oct), SE trade winds offshore

Getting There

Airport
GNS
Drive time
45 min
Data quality
verified

Strike Log

Community Discussion