The best time to plan a trip to Ishigaki Island is after July. Specifically, after the rainy season (usually from the end of May to the end of June), the weather is stable, the sea is clear, and you can fully enjoy the beauty of a tropical resort.
Table of Contents
- 1 Japan Meteorological Agency, "Weather Appearance Rates."
- 1.1 Weather determination conditions and priorities
- 1.2 Sunny rate from January to December (Ishigaki Island)
- 1.3 Ranking in order of month with the highest clear rate
- 1.4 Ishigaki City (Yaeyama Islands) yearly chance of clear/cloudy/rain
- 1.5 Ishigaki City (Yaeyama Islands) Difference between first and last place
- 1.6 Okinawa Main Island (Naha) By Bathing Season
- 1.7 summary
Ranking of Sunny Rate of Ishigaki Island by Weather Appearance Rate
What month is the best month to travel to Ishigaki Island?" I have received this question several times via DM on Instagram.
What convinces many people is that we suggest months with a high probability of clear skies based on the weather occurrence rate.The first thing I look forward to when I travel to Okinawa is "seeing the beautiful blue ocean.In the past, we have asked our followers on Okibura's Instagram why they go to Okinawa. In the past, when we asked our followers on Okibura's Instagram, "Why do you go to Okinawa?" the answer was "To see the beautiful ocean" (more than 300 responses).
Japan Meteorological Agency, "Weather Appearance Rates."
We always refer to the "weather occurrence rate" published by the Japan Meteorological Agency. In Okinawa Prefecture, data observed from 1991 to 2020 at four locations in Naha, Minamidaito Island, Miyako Island, and Ishigaki Island are disclosed on the website. The data is categorized into rain, cloudy, and clear based on the weather conditions of the day, which are then quantified.
Here, we will proceed by interpreting this as Ishigaki City (Yaeyama Islands). Please note that the weather on the islands is changeable and that the weather is not constant from island to island. Please use this data only as a reference.
Weather determination conditions and priorities
| weather | Judgment conditions | priority |
| rain | When daily precipitation of 1.0 mm or more is observed | 1 |
| cloudiness | When daily precipitation is less than 1.0 mm and daily mean cloud cover is 8.5 or more | 2 |
| clear weather | When daily precipitation is less than 1.0 mm and daily average cloud cover is less than 8.5 | 3 |
Citation:Okinawa Meteorological Observatory, "Weather Appearance Rates (%) for Various Locations".
How much is more than 1.0 mm of precipitation per day?
It is like a sprinkling of rain. Even if you walk outside for a little while without an umbrella, you will only get a little wet. It does not continue to rain for a long time, but feels like a beginning rain or a temporary light rain. The ground is a little wet and water droplets can be seen on leaves and car hoods. In general, this is the level of rain that makes you think, "I might want to bring an umbrella.
How much is the average daily cloud cover over 8.5?
Looking up at the sky, almost the entire area is covered with clouds, with little blue sky in sight. It looks as if a light rain is about to fall at any moment. The sun is hidden and the day can be described as slightly dark and heavy.
Then,Weather on Ishigaki Island.The following is a ranking of the monthly sunny rates for Ishigaki City from January to December based on the Please refer to it when planning your trip.
Sunny rate from January to December (Ishigaki Island)
It looks like this. I calculated it steadily...
Ranking in order of month with the highest clear rate
Ishigaki City (Yaeyama Islands) yearly chance of clear/cloudy/rain
Calculating all the observation data (1991-2020) for the Ishigaki Island site, the annual weather occurrence rate is 45.31 TP3T for sunny and 54.71 TP3T for cloudy/rainy.
If you want to visit Ishigaki Island, I would like to go between May and October, when the annual chance of clear skies exceeds 45.31 TP3T!
Ishigaki City (Yaeyama Islands) Difference between first and last place
In Ishigaki City and the Yaeyama Islands (Ishigaki Island point), July, the first month, has a clear sky ratio of 58.31 TP3T (3 days out of 5 days). In January, the lowest clear rate is 30.41 TP3T (1 out of 3 days clear). The difference between the two months is 281 TP3T, which is about twice the difference in the percentage of sunny days. Since December, January, and February are all below 401 TP3T, it may be difficult to have clear skies during the entire trip.
It is a wonder that Ishigaki and Miyako statistically rank 5th (within the top 6) in the overall probability of sunny weather in June, the rainy season when there is no image of sunny weather... lol.
Okinawa Main Island (Naha) By Bathing Season
The swimming season in Okinawa is generally from April to October. (In some places, you can go swimming in March or November.)
In terms of the swimming season, the first place is July (same as Miyakojima, Naha is in October), and the lowest is April (same as Miyakojima, Naha is in June). The top four months, July through October, with a probability of clear skies exceeding 50%, are considered to be good!
summary
So, if you want a sunny day trip to Ishigaki Island, the most probable month is July. If you can't pinpoint July, if you travel from May to October, you will be more likely to hit a sunny day.
Ishigaki Island is a place where you can enjoy the great nature more than Okinawa Island or Miyako Island. If only the weather would clear up, the sea would be blue, the mood would be good, and you would be satisfied. Please refer to these to plan your trip to Okinawa.
Contributor Profile
- Okinawa travel media "OKIBRA" has been happily operated since 2020 by Kazunari, a computer geek, and Son-chan, an anime & food lover! They love Okinawa so much that they have visited more than 50 hotels and 500 restaurants in the prefecture, and they share the charms of Okinawa on Instagram and on the web. We will bring you the charms of Okinawa that you can't find anywhere else, from the unique perspective of a husband and wife team!
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