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Underwater Photo Conditions

Photo score ranking (Visibility 40pts + Sunlight 40pts + Water Temp 20pts = 100)

1
YonaguniYonaguni
85Excellent
16~25m|40/40
Partly Cloudy|25/40
25.6°C|20/20
2
IshigakiOkinawa
85Excellent
16~22m|40/40
Partly Cloudy|25/40
26.7°C|20/20
3
KashiwajimaKashiwajima
70Good
12~19m|40/40
Overcast|10/40
22.3°C|20/20
4
70Good
14~24m|40/40
Overcast|10/40
23.2°C|20/20
5
HachijojimaHachijojima
60Good
15~19m|40/40
🌧️Rain|0/40
23.4°C|20/20
6
YakushimaYakushima
60Good
13~20m|40/40
Overcast|10/40
20.4°C|10/20
7
KeramaKerama
50Fair
11~22m|40/40
🌧️Rain|0/40
21.7°C|10/20
8
45Fair
15~18m|40/40
🌦️Rain|0/40
15.6°C|5/20
9
KushimotoKushimoto
45Fair
8~14m|25/40
🌦️Rain|0/40
23°C|20/20
10
KoganezakiKoganezaki
45Fair
9~13m|25/40
Overcast|10/40
18.6°C|10/20
11
TajiriTajiri
40Fair
9~18m|25/40
Overcast|10/40
13.4°C|5/20
12
FutoFuto
35Fair
8~14m|25/40
🌦️Rain|0/40
16.2°C|10/20
13
ItoTateyama
35Fair
7~18m|25/40
🌦️Rain|0/40
17.8°C|10/20
14
OkinoshimaKushimoto
35Fair
10~14m|25/40
🌦️Rain|0/40
20.1°C|10/20
15
BentenjimaKushimoto
35Fair
8~13m|25/40
🌦️Rain|0/40
19.6°C|10/20
16
FutoneTago
30Fair
7~10m|10/40
Overcast|10/40
18.1°C|10/20
17
ShirahamaShirahama
30Fair
7~11m|10/40
Overcast|10/40
20.7°C|10/20
18
30Fair
6~10m|10/40
Overcast|10/40
18.4°C|10/20
19
SadoSado
30Fair
8~17m|25/40
🌧️Rain|0/40
12.7°C|5/20
20
30Fair
6~11m|10/40
Overcast|10/40
19.9°C|10/20
21
EchizenEchizen
20Poor
4~9m|10/40
🌦️Rain|0/40
17.3°C|10/20
22
KumomiKumomi
20Poor
7~11m|10/40
🌦️Rain|0/40
16.6°C|10/20
23
MiyakejimaMiyakejima
20Poor
9~11m|10/40
🌧️Rain|0/40
19.3°C|10/20
24
TagoTago
20Poor
6~10m|10/40
Overcast|10/40
---|0/20
25
HirasawaHirasawa
15Poor
7~10m|10/40
🌦️Rain|0/40
15.1°C|5/20
26
MikomotoMikomoto
15Poor
7~10m|10/40
🌦️Rain|0/40
15.2°C|5/20
27
OmijimaOmijima
15Poor
6~10m|10/40
🌦️Rain|0/40
15°C|5/20
28
女川女川
15Poor
5~12m|10/40
🌦️Rain|0/40
12.7°C|5/20
How scores are calculated (click to expand)

Visibility (max 40pts)

  • 15m+ → 40pts
  • 10-15m → 25pts
  • 5-10m → 10pts
  • <5m → 0pts

Sunlight (max 40pts)

  • Clear/sunny → 40pts (strong underwater light, vivid colors)
  • Partly cloudy → 25pts (soft light, good for macro)
  • Overcast → 10pts (dim but strobe compensates)
  • Rain → 0pts (dark surface, insufficient light underwater)

Water Temp (max 20pts)

  • 22-28°C → 20pts (comfortable, extended shooting time)
  • 16-22°C or 28°C+ → 10pts (slightly cold/warm)
  • <16°C → 5pts (cold fingers make camera operation difficult)