Reef
left
Level 7/10

Asu

Hinako Islands, Indonesia
🪸Sharp reef🏝️Remote🚶Difficult access

Asu is Indonesia's best-kept secret left—a pristine, barreling wave off a speck of an island in the Hinako group that few surfers ever reach. The journey here is an adventure in itself: flights, boat transfers, and basic island living, but the reward is potentially perfect waves with a handful of other surfers at most. The left reels along a coral-strewn reef, offering long, makeable barrels when the Indian Ocean delivers. Asu represents the ultimate surf trip ethos: go further, score better, embrace the simple life.

10-Day Forecast
Thu6
27
Poor
2.7m@17s
15km/h
Fri7
58
Fair
2.7m@16s
8km/h
Sat8
63
Fair
2.8m@16s
7km/h
Sun9
72
Good
2.7m@15s
12km/h
Mon10
75
Good
2.5m@15s
18km/h
Tue11
61
Fair
3.3m@18s
16km/h
Wed12
74
Good
3.0m@17s
12km/h
Thu13
73
Good
2.1m@14s
7km/h
Fri14
70
Good
3.1m@17s
4km/h
Sat15
71
Good
1.9m@15s
7km/h
Groomed Choppy 5+ days out, less certain

Today's Conditions

Find Flights
Best session: MorningAM 16 km/h · PM 17 km/h · High tide at 9am (0.5m)
Swell
2.7m
SSW(199°)
Score: 19/25
Period
17s
Long period groundswell
Score: 23/25
Wind
15km/h
NW(316°)
Score: 0/25
Weather
28°C
0.3mm95%
First light 6:02amSunrise 6:32amSunset 6:40pmLast light 7:10pm
Windswell0.2m@2sSecondary1.4mConfidence
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: 0.5–1.5m
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
28°
28°
28°
28°
27°
28°
28°
28°
29°
29°
27°
27°
28°
28°
28°
28°
29°
27°
27°
28°
26°
27°
28°
29°
29°
28°
28°
29°
29°
29°
27°
27°
28°
28°
29°
28°
27°
27°
28°
28°
27°
28°
28°
28°
28°
27°
27°
28°
28°
28°
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
17s
17s
17s
17s
17s
14s
14s
14s
14s
14s
17s
17s
17s
17s
17s
15s
15s
15s
15s
15s
swell
windkm/h
20g27
13g21
12g18
17g22
16g31
15g22
10g16
3g10
6g14
6g11
5g10
12g19
5g11
8g13
9g15
11g17
14g22
6g21
12g24
17g26
16g30
16g28
18g26
19g27
21g27
19g30
17g25
17g25
13g24
13g25
13g25
14g25
12g22
11g22
12g23
6g18
4g17
7g14
9g16
9g20
4g20
2g19
4g15
5g14
7g16
4g24
4g22
7g14
9g15
14g22
tidem
4:15am0.2m
9:45am0.5m
4:00pm0.1m
5:50am0.3m
10:50am0.4m
5:10pm0.2m
8:30am0.3m
12:50pm0.4m
6:30pm0.2m
2:15am0.6m
9:54am0.1m
3:00pm0.3m
8:06pm0.1m
3:30am0.7m
10:40am0.1m
4:06pm0.4m
9:30pm0.1m
4:21am0.8m
11:21am0.1m
5:00pm0.5m
10:30pm0.1m
5:12am0.9m
12:03pm0.0m
5:38pm0.6m
5:54am0.9m
12:36pm0.0m
6:23pm0.6m
6:36am0.9m
1:02pm0.0m
7:00pm0.7m
12:54am0.1m
Ideal tideStrike windowNight

Tide times today

4:15 am
Low tide - 0.20m
9:45 am
High tide - 0.46m
4:00 pm
Low tide - 0.12m
Times shown in spot-local time.

Strike Score Breakdown

27
Poor
Components
Swell Direction11/25
Swell Size19/25
Swell Period23/25
Wind0/25
Raw Score53/100
Adjustments
🤢 Wind History-10
🌊 Tide-1
💨 Gusty Wind-5
⚠️ Weak Component-10
Adjusted Score27/100
Confidence
Multiplier×1.00
Final Score27
🤢 Morning Sickness🌊 Slightly below optimal tide

Plan Your Strike

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

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Swell Requirements

Optimal direction
SW (225°)
Direction range
200° - 250°
Size range
1m - 3m
Ideal size
2.4m
Height multiplier
0.97×
Ideal period
14s+

Wind Requirements

Optimal direction
SE (135°)
Offshore range
90° - 180°

Tide Requirements

Optimal tide
mid to high
Optimal range
0.5m - 1.5m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

7/10

Crowd level

2/10

Access: Boat from Nias or Sibolga.

Frequently Asked Questions

What tide is best at Asu?

Asu works best on a mid to high tide, ideally between 0.5m and 1.5m on the local tide chart. The tide chart above shows today’s strike window.

What wind direction is offshore at Asu?

Offshore wind at Asu blows from the SE (135°). Anything in the 90° to 180° range grooms the faces; outside it, expect chop or bumpy conditions.

What swell size and direction work best at Asu?

Asu wants SW swell (200° to 250°) between 1m and 3m, with a period of 14s or more for quality waves.

When is the best time of year to surf Asu?

The main season at Asu is Apr-Oct. April-October. Indian Ocean swells.

How do I get to Asu?

Fly into GNS, then allow about 0 minutes by road, plus a boat transfer (around $180 USD). Boat from Nias or Sibolga.

What kind of wave is Asu?

Asu is a reef break, a left-hander. Difficulty is rated 7/10.

Best Season

Peak: Apr-Oct

April-October. Indian Ocean swells.

Getting There

Airport
GNS
Drive time
0 min
Boat required
$180
Data quality
verified

Strike Log

Community Discussion