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Meteorology · Ship Routing · Observation
Climate Signals

Climate & Space Weather

The longer-term context behind today's weather, plus the weather above the weather — ocean heat, surface temperature departures, sea ice, ENSO and MJO state, live solar imagery, and aurora forecasts.

Local Climatology · Your Locations
Annual Cycle · 30-Year Normals
Normal high ▬ · normal low ▬ · daily mean ┄
Tap or drag anywhere on the chart to inspect a calendar day — the panel below follows. The dashed grey line marks today.
This Day Across 30 Years
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The full spread of daily high temperatures on this calendar date across the 30-year archive — record ends, the normal range, and where this year landed.
Precipitation · Monthly Normals
Average monthly precipitation totals over the 30-year window. ERA5 gridded reanalysis — totals can differ from official station gauge normals.
This Year vs Normal
Cumulative daily-mean temperature departure from the 30-year normal, January 1 through the latest archived day. Above the zero line, the year is running warm; below, cool.
Daily Anomalies

Daily Sea Surface Temperature

NOAA OISST v2.1

Daily SST and anomaly maps — the dataset behind the viral 2023–24 ocean-warmth charts. 1–2 day lag.

Daily · ~2-day lag Launch viewer →

Daily 2m Air Temperature

ECMWF ERA5

Daily surface air temperature and departure from the 1979–2000 normal — the atmospheric companion to SST.

Daily Launch viewer →

Daily Map Animation

Combined viewer

Animated viewer for SST, 2m air temperature, and sea ice — date slider plays back through any year or basin.

Daily · full archive Launch viewer →

Monthly SST

NOAA ERSSTv5

Monthly SST and anomaly maps back to 1854 — long-term context for the daily snapshots, gridded reanalysis.

Monthly · 170-year archive Launch viewer →
MJO & ENSO · Live State
RMM Phase Diagram · Bureau of Meteorology (Australia)
MJO RMM phase diagram, last 40 days
Wheeler–Hendon RMM (Real-time Multivariate MJO) index, the canonical 8-phase Indo–Pacific phase diagram. Trace shows the last 40 days. Inside the unit circle = MJO inactive; outside = active. Phases 4–7 typically enhance Pacific tropical convection and modulate North American extreme precipitation.
Niño Region SST Anomaly Time Series · NOAA CPC
Weekly SST anomalies — Niño 1+2, 3, 3.4, 4 regions
Weekly mean SST anomaly time series for all four Niño regions (1+2, 3, 3.4, 4). The Niño 3.4 line (5°S–5°N, 170°W–120°W) is the canonical El Niño / La Niña indicator. Above +0.5°C sustained = El Niño; below −0.5°C = La Niña. Click through for the full CPC ENSO monitoring suite.
Climate Indicators

Sea Ice Concentration

NSIDC

NSIDC at CU Boulder — Arctic and Antarctic sea ice extent, daily and monthly, with anomaly time series.

Daily Launch viewer →

Extreme Weather Watch

Historical records

Historical weather for any US station — daily highs/lows, monthly extremes, snowfall, rainfall, full record.

Per-station archive Launch viewer →
The Sun, Live
NOAA SUVI · GOES Solar Ultraviolet Imager
NOAA SUVI latest solar image
Updated every few minutes from the Solar Ultraviolet Imager aboard the operational GOES satellite. Each wavelength captures a different layer of the sun — 304Å the chromosphere, 171Å the quiet corona, 195Å hot corona and flare plasma, 284Å active regions. SUVI is NOAA SWPC's operational space-weather imager (functionally similar to NASA SDO, which has been offline since December 2025).
Geomagnetic Activity
Planetary Kp Index · NOAA SWPC
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Kp is the global geomagnetic activity index, 0 to 9, updated every 3 hours from eight worldwide magnetometers. Above 5 and geomagnetic storms are in progress — aurora visible further south, HF radio communications degraded, GNSS precision reduced.
Aurora Forecast
NOAA SWPC OVATION · 30-minute aurora forecast
OVATION northern hemisphere aurora forecast
OVATION (Oval Variation, Assessment, Tracking, Intensity, and Online Nowcasting) model. Predicts aurora intensity and location 30–90 minutes ahead. Refreshes every 5 minutes.
Deeper Sun

Real-Time Solar Wind

NOAA SWPC · DSCOVR + ACE

Live solar-wind parameters from DSCOVR at L1 (ACE backup) — IMF, Bz, speed, density, ~30–60 min ahead of impact.

1-minute cadence Launch viewer →

Helioviewer

NASA + ESA · Multi-mission solar archive

NASA + ESA's joint solar-imaging platform — SDO, STEREO, SOHO, and ground telescopes with solar-event markers.

Continuous archive Launch Helioviewer →

Local climatology computed client-side from the Open-Meteo Archive API (ECMWF ERA5 reanalysis, CC-BY 4.0) — 30-year reanalysis statistics, not official NWS/NCEI station normals or all-time records. Daily anomaly imagery from Climate Reanalyzer, University of Maine Climate Change Institute (CC-BY-4.0). Climate indices from NOAA Climate Prediction Center and the National Snow and Ice Data Center at the University of Colorado. Solar imagery from NOAA's Solar Ultraviolet Imager (SUVI) aboard the operational GOES satellite. Kp index, aurora forecasts, and real-time solar wind also from the NOAA Space Weather Prediction Center. Helioviewer maintained jointly by NASA and ESA.