Can you swim here today?
Green Bay
Wisconsin · Bay
Use caution — an official advisory is in effect
Use cautionAs of August 23, 2026, the water temperature at Green Bay is 70°F (21°C), measured by NOAA buoy MNMM4, 7.8 miles away.
Use caution — an official advisory is in effect: water temperature is 70°F, cool enough to cause cold-water shock on a sudden entry.
- Water temperature is 70°F, cool enough to cause cold-water shock on a sudden entry. — NOAA buoy MNMM4, as of Aug 23, 1:00 AM UTC
- A Small Craft Advisory is in effect for Green Bay south of line from Cedar River to Rock Island Passage and north of a line from Oconto WI to… and other areas. — NWS Green Bay WI
Water temp
70°F
21°C
No official beach-advisory feed for Wisconsin yet — follow posted signs and local guidance.
Live data from NOAA buoy MNMM4 (7.8 mi away), as of Aug 23, 1:00 AM UTC.
Before you get in
- Never swim alone — and keep weaker swimmers within arm's reach.
- Scout depth and entry/exit points before you get in.
- Read the current: avoid fast, rising, or murky water.
- Check the forecast — get out well before storms or lightning.
- Obey posted signs, flags, and lifeguard guidance.
Read next
Conditions are for general information only and can change quickly. Always judge the water in person and follow posted advisories and local guidance before swimming or paddling.