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.

Sebatu surf forecast

Model forecast for swell, wind and tide.

10-Day Forecast
Today20
73
Good
2.5m@16s
7km/h
Mon21
71
Good
2.5m@15s
5km/h
Tue22
53
Fair
1.9m@14s
6km/h
Wed23
58
Fair
1.9m@16s
9km/h
Thu24
55
Fair
1.5m@15s
8km/h
Fri25
45
Fair
1.5m@14s
8km/h
Sat26
62
Fair
1.4m@18s
5km/h
Sun27
70
Good
2.3m@18s
8km/h
Mon28
66
Good
2.1m@16s
7km/h
Tue29
57
Fair
1.5m@15s
7km/h
5+ days out, less certain

Today's Conditions

Find Flights
Best session: AfternoonAM 8 km/h · PM 6 km/h · High tide at 2pm (0.3m)
Swell
2.5m
SSW(206°)
Score: 20/25
Period
16s
Long period groundswell
Score: 25/25
Wind
7km/h
SE(131°)
Score: 15/25
Weather
29°C
0.0mm74%
First light 5:48amSunrise 6:18amSunset 6:25pmLast light 6:55pm
Secondary0.5mConfidence
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
26°
29°
31°
30°
28°
25°
29°
31°
30°
28°
26°
28°
29°
27°
27°
26°
28°
29°
30°
28°
27°
29°
30°
30°
28°
26°
28°
30°
30°
28°
26°
27°
29°
29°
27°
24°
26°
28°
28°
27°
25°
27°
29°
29°
27°
27°
29°
31°
30°
27°
3m1.5
sec
16s
16s
16s
16s
16s
15s
15s
15s
15s
15s
14s
14s
14s
14s
14s
16s
16s
16s
16s
16s
15s
15s
15s
15s
15s
14s
14s
14s
14s
14s
18s
18s
18s
18s
18s
18s
18s
18s
18s
18s
16s
16s
16s
16s
16s
15s
15s
15s
15s
15s
swell
windkm/h
8g12
8g20
7g22
7g25
5g11
0g2
4g12
6g19
7g22
6g15
3g8
7g19
8g24
6g25
4g13
7g11
10g25
10g28
10g26
6g19
8g14
10g23
11g29
7g29
2g20
5g11
8g20
9g25
11g27
6g28
1g10
3g14
9g24
8g28
5g27
9g19
10g21
7g22
7g24
7g25
4g13
5g18
9g26
9g28
7g27
11g21
10g23
7g27
3g28
2g27
tidem
8:30am0.3m
2:30pm0.3m
1:50am0.6m
9:30am0.2m
3:15pm0.4m
8:30pm0.3m
3:00am0.6m
10:00am0.2m
3:50pm0.5m
9:30pm0.3m
3:40am0.7m
10:10am0.2m
4:12pm0.6m
9:55pm0.2m
4:07am0.8m
10:37am0.1m
4:38pm0.7m
4:45am0.8m
11:00am0.1m
5:07pm0.7m
5:15am0.8m
11:23am0.1m
5:36pm0.8m
5:43am0.8m
11:51am0.1m
6:03pm0.9m
6:16am0.8m
12:18pm0.0m
6:30pm0.9m
1:00am0.0m
Ideal tide (from tide preference)Strike windowNight

Tide times today

8:30 am
Low tide - 0.27m
2:30 pm
High tide - 0.34m
5:00 pm
Low tide - 0.32m
Times shown in spot-local time.

Strike Score Breakdown

73
Good
Components
Swell Direction16/25
Swell Size20/25
Swell Period25/25
Wind15/25
Raw Score76/100
Adjustments
💨 Gusty Wind-3
Adjusted Score73/100
Confidence
Multiplier×1.00
Final Score73

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
2.9m - 3.8m
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?

The Sebatu profile favors high tide, ideally between 1m and 2m on the local tide chart. Compare this preference with the forecast tide and local conditions before choosing a session.

What wind direction is offshore at Sebatu?

The Sebatu profile uses wind from N (0°) as its preferred direction, with an offshore range of 330° to 30°. Wind speed matters too: light winds outside that range can still produce surfable conditions, while strong offshore winds can make takeoffs difficult.

What swell size and direction work best at Sebatu?

The Sebatu scoring profile favors swell from SW (180° to 260°), a swell-height range of 1.5m to 4.6m, and a reference period of 16s. These are model inputs, not guaranteed breaking-wave heights or a promise that the surf will suit every ability.

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?

The spot profile lists GNS as a nearby airport. The estimated road transfer is 45 minutes. 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