Tokashiki (AMeDAS)

Station

JMA has no station on Zamami. The Tokashiki AMeDAS point (block 1152) on Tokashiki-jima is the only station in the Kerama Islands with 1991–2020 normals. JMA's station list shows the Kerama AMeDAS point (block 1516) near Kerama Airport ending in January 2020, and JMA publishes no normals for it. The Tokashiki station stands 220 m above sea level, and by our comparison its monthly mean temperatures from December to March run 1.6–1.9 °C below Naha's. It has no humidity normals, so that column stays empty. Rain days count the days with 1 mm or more.

Winter

Due north is the most frequent winter wind at Tokashiki, turning up in 17–23% of observations from December to March at an average of 4.9 m/s. The day's strongest wind reaches 10 m/s on 5.4 to 6.2 days a month in that stretch. February gets 97.6 hours of sunshine and 129.2 mm of rain over 11.3 days.

Spring

In early spring a low from the East China Sea sometimes deepens fast as it crosses Okinawa. Once its cold front passes, a southerly wind swings round to a strong north or north-east wind and the temperature drops. Okinawans have long called this *ningwachi kajimaai* (the wind turn of the second lunar month).

Summer

When the rainy season ends in late June the Pacific high pushes west and a strong south to south-west wind called *kaachiibee* blows steadily for several days.

Typhoon

JMA counts a typhoon as approaching the Okinawa region when its centre comes within 300 km of a station there, and the 1991–2020 normal is 7.7 approaches a year. August averages 2.2 approaches and September 1.9. Across those 30 years JMA recorded no approach at all from January to March.

Rainy

JMA's 1991–2020 average puts the start of Okinawa's rainy season around 10 May and its end around 21 June. JMA's preliminary dates for 2026 were around 4 May and around 29 June. Okinawans call the season *suuman boosuu* after two of the old solar terms that fall inside it.

Sea

Sea temperatures are our monthly averages of JMA's daily 1991–2020 sea surface normals at its fixed point south-east of Kume-jima (久米島南). The monthly figure runs from 22.1 °C in February up to 29.3 °C in August. The Kerama Islands lie between this point and JMA's point south of Okinawa Island, and by our comparison the two run within 0.2 °C of each other in every month.

Wind

The windDir field holds JMA's most frequent wind direction (最多風向) for each month as the 16-point compass point the wind blows from.