Reef
right
Level 6/10

Boa

Rote Island, Indonesia
🪸Sharp reef

Boa is a quality right reef break on Rote Island that produces standout barrel sessions when conditions align. The key to scoring Boa is timing—it needs a specific combination of swell direction and tide to fire, making a local surf guide invaluable. When it's on, Boa delivers multiple barrel opportunities per wave, rivaling any right-hander in the eastern Indonesian archipelago.

Boa surf forecast

Model forecast for swell, wind and tide.

10-Day Forecast
Today4
54
Fair
1.3m@11s
13km/h
Thu5
63
Fair
1.2m@13s
7km/h
Fri6
56
Fair
1.1m@14s
7km/h
Sat7
48
Fair
1.2m@12s
13km/h
Sun8
59
Fair
1.1m@16s
15km/h
Mon9
44
Poor
1.0m@14s
11km/h
Tue10
44
Poor
0.9m@12s
7km/h
Wed11
30
Poor
0.7m@12s
8km/h
Thu12
44
Poor
0.9m@13s
12km/h
Fri13
44
Poor
0.9m@14s
15km/h
Groomed 5+ days out, less certain

Today's Conditions

Find Flights
Best session: AfternoonAM 10 km/h · PM 14 km/h · Low tide at 12pm (1.0m) Groomed
Swell
1.3m
SW(235°)
Score: 13/25
Period
11s
Mid-period swell
Score: 8/25
Wind
13km/h
SE(128°)
Score: 24/25
Weather
32°C
0.0mm28%
First light 4:46amSunrise 5:16amSunset 5:47pmLast light 6:17pm
Windswell
0.1m@1s
Secondary
0.2m
Confidence
100%

Location & Conditions

Loading map...
Swell1.3m @11s SW outside window
Wind13 km/h SE offshore
SwellWind: Offshore Cross Onshore
Showing forecast for today · all day

Hourly Forecast, Tide & Strike Windows

Strike window: 10:18am–1:53pm · through lowIdeal tide: 0.3–1.2m
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°
33°
33°
32°
30°
28°
33°
34°
33°
30°
28°
34°
35°
33°
30°
28°
33°
34°
32°
29°
29°
33°
33°
31°
28°
29°
32°
33°
32°
29°
30°
32°
32°
31°
30°
30°
31°
33°
33°
30°
30°
32°
32°
31°
29°
30°
31°
32°
32°
30°
2m1.0
sec
11s
11s
11s
11s
11s
13s
13s
13s
13s
13s
14s
14s
14s
14s
14s
12s
12s
12s
12s
12s
16s
16s
16s
16s
16s
14s
14s
14s
14s
14s
12s
12s
12s
12s
12s
12s
12s
12s
12s
12s
13s
13s
13s
13s
13s
14s
14s
14s
14s
14s
swell
windkm/h
7g11
13g30
14g37
17g37
11g25
6g11
9g25
4g22
6g21
11g22
8g15
10g27
5g28
9g25
4g15
7g13
12g32
12g34
18g38
13g31
9g18
12g29
14g36
19g44
18g40
11g25
11g29
11g32
12g29
12g29
11g23
9g25
3g26
4g27
9g30
11g25
10g27
7g26
6g27
8g30
15g29
15g34
12g37
10g37
10g33
12g25
13g30
16g36
17g39
15g40
tidem
5:18am2.1m
12:04pm1.0m
6:53pm2.3m
1:08am1.1m
7:06am2.2m
1:12pm0.9m
7:43pm2.6m
2:09am0.8m
8:13am2.3m
2:01pm0.9m
8:20pm2.8m
2:54am0.5m
9:00am2.5m
2:42pm0.8m
8:54pm3.0m
3:30am0.3m
9:39am2.5m
3:17pm0.8m
9:26pm3.1m
4:01am0.1m
10:15am2.6m
3:51pm0.7m
9:57pm3.2m
4:33am0.0m
10:47am2.6m
4:20pm0.7m
10:24pm3.2m
5:02am0.0m
11:16am2.6m
4:50pm0.8m
5:33am0.0m
11:49am2.5m
5:19pm0.8m
6:02am0.1m
Ideal tideStrike windowNight

Tide times today

5:18 am
High · 2.10m
12:04 pm
Low · 0.98m
6:53 pm
High · 2.32m
Times shown in spot-local time.

Strike Score Breakdown

54
Fair
Components
Swell Direction9/25
Swell Size13/25
Swell Period8/25
Wind24/25
Raw Score54/100
Adjustments
✨ Wind History+4
🌊 Tide+1
💨 Gusty Wind-5
Adjusted Score54/100
Confidence
Multiplier×1.00
Final Score54
✨ Groomed🌊 Partly in the tide window

Plan Your Strike

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

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Swell Requirements

Optimal direction
SSW (205°)
Direction range
190° - 220°
Size range
1.2m - 2.4m
Ideal size
1.7m - 2.1m
Height multiplier
0.97×
Ideal period
14s+

Wind Requirements

Optimal direction
ESE (112°)
Offshore range
82° - 142°

Tide Requirements

Optimal tide
low to mid
Optimal range
0.3m - 1.2m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

6/10

Crowd level

4/10

Access: Fly via Kupang or ferry from Kupang

Frequently Asked Questions

What kind of wave is Boa?

Boa is a reef break in Rote Island, Indonesia, that mostly breaks right.

What swell works best at Boa?

Boa picks up swell from the S round to the SW, and it's best when it's coming straight out of the SSW. That's a tight window, so it needs the swell direction to line up. It starts working at around 1.2m and handles up to about 2.4m, with the sweet spot around 1.7 to 2.1m. Period matters too: aim for 14s or longer, as anything under 10s tends to be weak. These are the numbers our scoring uses, so treat them as a guide rather than a promise.

What wind is offshore at Boa?

An ESE wind is dead offshore at Boa, and anything from the E round to the SE keeps it clean. The morning is typically the best window, roughly 6am to midday. Light winds from other directions can still be fine; strong offshores can make it hard to get into waves.

What tide is best at Boa?

Boa is at its best around the low to mid tide, roughly 0.3m to 1.2m on the local chart.

When is the best time of year to surf Boa?

The most reliable run of swell at Boa comes Apr to Oct. There's a second window in Nov to Mar too. Best Apr-Oct (dry season, SE trades offshore). Swells year-round but wet season brings onshore winds.

How cold is the water at Boa?

The water at Boa averages around 28°C, so boardshorts or a rashguard will do. It shifts a few degrees through the year, so check the season before you pack.

Is Boa good for beginners?

It's more of an intermediate wave, rated 6/10 for difficulty, so newer surfers are best off sticking to the smaller days. Expect a moderate crowd (4/10) when it's on. Things to watch for: sharp, shallow reef (booties help).

How do I get to Boa?

The nearest airport on our list is RTI, then it's roughly a 20-minute drive. Fly via Kupang or ferry from Kupang.

What other surf spots are near Boa?

The closest breaks we track are Do'o (5.5 km), T-Land (19 km) and Suckies (22 km), handy when Boa isn't working. We track 4 spots around Rote Island in total. Fun fact: it's the most southerly break we track in Indonesia.

Best Season

Peak: Apr-Oct

Secondary: Nov, Dec, Jan, Feb, Mar

Best Apr-Oct (dry season, SE trades offshore). Swells year-round but wet season brings onshore winds.

Getting There

Airport
RTI
Drive time
20 min
Data quality
verified

Strike Log

Community Discussion