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Beaches/Riiska järv
Valgamaa · Lake

Riiska järv water temperature

Season overStation reading 20.09 13:00
The lifeguard season has ended. Nobody is measuring the water or raising a flag at this beach right now — last reading 27.08 17:05. The water temperature below comes from the nearest Ilmateenistus station, which measures year-round, with weather and UV from Open-Meteo.
Last reading of the season · 27.08 17:05 · water 16 °C, air 22 °C
Water temperature
13.5°C
Water: Tõrva (1.1 km)
Change over the last 6 weeks of the season, to 28.08 · -5 °C
16°C
Air
2
UV · low
Water quality: Excellent Bathing water class 2026 - Väga hea. E. coli 2 PMÜ/100 ml. Sampled 10.08.2026. View water quality

The water temperature at Riiska järv today is about 13.5 °C, the water is quite cold. Right now there is air temperature 16 °C and UV 2.

Today hour by hour

Open-Meteo
UV now –
Day's highest UV 3 at 13:00
Sun protection recommended 13:00–14:00
06:00UV through the day22:00
06
14°
UV 0
07
14°
UV 0
08
14°
UV 0
09
14°
UV 0
10
14°
UV 0
11
14°
UV 0
12
14°
UV 2
13
15°
UV 3
14
15°
UV 3
15
15°
UV 3
16
15°
UV 2
17
15°
UV 2
18
15°
UV 1
19
15°
UV 0
20
14°
UV 0
21
14°
UV 0
22
13°
UV 0

Weekly forecast

Open-Meteo
Sun
20.09
Today
Rain
15° / 12°
UV3
Wind7 m/s
Mon
21.09
Rain
15° / 10°
UV3
Wind4 m/s
Tue
22.09
Cloudy
15° / 9°
UV3
Wind5 m/s
Wed
23.09
Showers
16° / 9°
UV1
Wind6 m/s
Thu
24.09
Showers
14° / 9°
UV2
Wind6 m/s
Fri
25.09
Rain
14° / 8°
UV0
Wind5 m/s
Sat
26.09
Rain
16° / 7°
UV2
Wind5 m/s
Air quality
20good
0 · good100+ · very poor
European Air Quality Index — lower is cleaner air. Based on fine particles (PM2.5, PM10) and other pollutants.
PM2.5 2.6 · PM10 3.4 µg/m³ Open-Meteo
History and trend

How the water has warmed

Pick a year and a range, then move your mouse or finger over the chart. "Compare years" places different summers' water temperatures on one axis to line them up.

Water Air
Year:

Over the last 59 measurements the water temperature at Riiska järv has fallen: from 20 °C to 16 °C (lowest 15.7 °C, highest 23 °C).

Frequently asked questions

Good to know before you go in

Where does the data come from?
Water temperature comes from the G4S and Forus beach sensors, air temperature and wind from the nearest Ilmateenistus station (Tõrva), and the UV index from Open-Meteo. Readings are refreshed several times a day when available.
Is there beach data in winter too?
The monitored beaches are a summer service: G4S and Forus report while the bathing season lasts, and the swim flag and crowd count stop with it. Right now the water temperature on this page comes from the Tõrva Ilmateenistus station, which measures year-round. Ilmateenistus stations, the Health Board's bathing-water samples and the Open-Meteo forecast keep updating all year, so the page stays useful out of season — and the lifeguard readings return with the next season.
What do the flag colours mean?
Green means swimming is safe. Yellow calls for caution (strong wind, high waves or poor visibility) and red means it is not worth going in. A purple flag indicates water pollution.
How strong a wind is still fine for a SUP?
Up to about 4 m/s is comfortable for a beginner; the more experienced manage at 6-7 m/s. In strong wind and gusts a board drifts quickly into open water. Always watch the wind direction too: an offshore wind carries you out to sea.
How warm does the water need to be?
While you stay on the board the water warmth is not decisive, you can paddle already at 12 °C. We recommend wearing a life vest and keeping in mind that cold water is a shock if you fall in.
How do I book a SUP?
Tap "Rent a SUP", pick a time and pay by card. You get a door code that opens the locker around the clock, and the board is yours right away.
Location and SUP rental

Riiska järv on the map

Riiska järv Harku järv Vanamõisa järv Viljandi järv
Suppy rental points

Rent SUP boards from a Suppy self-service locker, open 24/7. Nearest rental points:

Harku järvTallinn Vanamõisa järvTõrva Viljandi järvViljandi
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Nearby

Other nearby waters

Vanamõisa järvValgamaa · Lake 13.5° PühajärvValgamaa · Lake 13.4° Kakumäe randHarjumaa · Baltic Sea 15.7° Kuressaare randSaaremaa · Baltic Sea 15.6° Paralepa randLäänemaa · Baltic Sea 15.5° Vasikaholmi randLäänemaa · Baltic Sea 15.5°
Safety

What the flag colours mean

Green. The water is calm, conditions are good and the water is above 18 °C. Safe for swimming.

Yellow. Water 16–18 °C, or strong wind, high waves or unstable weather at the same time.

Red. Water below 16 °C, strong wind or high waves. Swimming is not advised.

Red-yellow. The area between the flags is supervised by a lifeguard.

Purple. Water pollution. With a purple flag, swimming is not advised.

Data sources Ilmateenistus · air, windOpen-Meteo · UV, forecast
Data is for guidance only.