Fifteenmile Creek Water Temperature Forecast

Oregon Department of Fish & Wildlife
Forecast: Wednesday, September 2, 2026 Upper alert: 22°C / 72°F Lower alert: 23°C / 73°F
Water temperatures are below alert thresholds.

7-Day Water Temperature Forecast — 15/8 Mile, Moody, Pine Creek

🧊 0-2°C Frigid❄ 3-6°C Cold💧 7-10°C Cool✅ 11-17°C Optimal☀ 18-22°C Warm🌡 23-26°C Alert!⚠ 27°C+ Critical
Today
Sep 2
✅ Optimal
15/8 MILE
16.7°
62°F
MOODY
17.1°
63°F
PINE CK
15.2°
59°F
Thu
Sep 3
✅ Optimal
15/8 MILE
15.8°
61°F
MOODY
16.4°
62°F
PINE CK
14.7°
58°F
Fri
Sep 4
✅ Optimal
15/8 MILE
15.3°
60°F
MOODY
15.9°
61°F
PINE CK
14.3°
58°F
Sat
Sep 5
✅ Optimal
15/8 MILE
15.2°
59°F
MOODY
15.8°
61°F
PINE CK
14.3°
58°F
Sun
Sep 6
✅ Optimal
15/8 MILE
15.3°
60°F
MOODY
16.2°
61°F
PINE CK
14.6°
58°F
Mon
Sep 7
✅ Optimal
15/8 MILE
15.5°
60°F
MOODY
16.5°
62°F
PINE CK
14.9°
59°F
Tue
Sep 8
✅ Optimal
15/8 MILE
15.6°
60°F
MOODY
16.9°
62°F
PINE CK
15.2°
59°F

7-Day Weather Forecast — The Dalles, OR

Today
Sep 02
Cloudy
67° / 50°F19° / 10°C
RH 81% · DP 52°F
Thu
Sep 03
Cloudy
64° / 46°F18° / 8°C
RH 81% · DP 50°F
Fri
Sep 04
Cloudy
68° / 47°F20° / 8°C
RH 77% · DP 49°F
Sat
Sep 05
Cloudy
71° / 49°F22° / 9°C
RH 69% · DP 49°F
Sun
Sep 06
Sunny
74° / 52°F23° / 11°C
RH 64% · DP 50°F
Mon
Sep 07
Cloudy
72° / 54°F22° / 12°C
RH 68% · DP 52°F
Tue
Sep 08
Cloudy
76° / 53°F24° / 12°C
RH 68% · DP 52°F

Water Temperature — All Sites (Observed + Forecast)

Pine Creek
Moody (Fifteenmile Ck)
Kaser Bridge (Fifteenmile Ck)
15/8 Mile Confluence
Eightmile Creek
Alert 22.0°C
🧊 0-2°C Frigid
❄ 3-6°C Cold
💧 7-10°C Cool
✅ 11-17°C Optimal
☀ 18-22°C Warm
🌡 23-26°C Alert
⚠ 27°C+ Critical

Discharge (cfs) — All Sites

Pine Creek
Moody (Fifteenmile Ck)
Kaser Bridge (Fifteenmile Ck)
15/8 Mile Confluence
Eightmile Creek
solid = observed   dashed = predicted

Daily Detail — All Sites

DateSrcFifteenmile CreekEightmile CreekAir °FRH%
Pine Creek°C (°F) Moody°C (°F) Kaser Bridge°C (°F) 15/8 Mile Confluence°C (°F) Eightmile Creek°C (°F)
Sun Aug 30Obs 14.6 (58.3) 15.6 (60.1) 6650
Mon Aug 31Obs 15.3 (59.5) 15.8 (60.4) 6945
Tue Sep 1Obs 15.5 (59.9) 16.3 (61.3) 6952
TodayFcst 15.2 (59.4) 17.1 (62.9) 18.0 (64.4) 16.7 (62.0) 15.5 (59.9) 5881
Thu Sep 3Fcst 14.7 (58.4) 16.4 (61.5) 17.0 (62.6) 15.8 (60.5) 14.5 (58.1) 5681
Fri Sep 4Fcst 14.3 (57.7) 15.9 (60.7) 16.5 (61.6) 15.3 (59.5) 14.0 (57.2) 5777
Sat Sep 5Fcst 14.3 (57.7) 15.8 (60.5) 16.5 (61.7) 15.2 (59.3) 14.1 (57.4) 6069
Sun Sep 6Fcst 14.6 (58.2) 16.2 (61.1) 16.9 (62.4) 15.3 (59.6) 14.5 (58.2) 6264
Mon Sep 7Fcst 14.9 (58.8) 16.5 (61.7) 17.2 (62.9) 15.5 (59.9) 14.9 (58.9) 6368
Tue Sep 8Fcst 15.2 (59.4) 16.9 (62.4) 17.5 (63.5) 15.6 (60.1) 15.3 (59.5) 6468
Wed Sep 9Fcst 15.5 (59.8) 17.2 (63.0) 17.8 (64.0) 15.8 (60.4) 15.6 (60.1) 6565

Alert Specifications

Thresholds: Upper Fifteenmile Creek (Pine Creek, Moody): 22°C / 72°F. Lower Fifteenmile Creek (Kaser, 15/8 Mile, Eightmile): 23°C / 73°F.
Alert issued: When 2 or more sites are predicted to exceed their respective temperature threshold for 2 or more consecutive forecast days.
Minimum duration: Once issued, the alert remains active for a minimum of 5 days regardless of whether predicted temperatures drop below thresholds.
Alert called off: After the 5-day minimum has elapsed, the alert is cancelled when all three conditions are met: (1) at least 5 days have passed since the alert was first issued, (2) the current day's predicted temperatures at all sites are below their thresholds, and (3) the forecast shows 2 or more sites below threshold for 2 or more consecutive days, confirming the heat event is ending.
Fifteenmile Creek Water Temperature Prediction System • Oregon Department of Fish & Wildlife • Generated 2026-09-02