Grid GB25 Band Conditions
Localized HF conditions for Maidenhead locator GB25. Coordinating at -74.50°, -55.00°. Updated with real-time telemetry from NOAA and DX cluster reports.
GB25 conditions are FAIR. Best bands: 10m, 20m, 30m, 40m, 60m. SFI: 137.
From the GB25 operating area, work the no sunrise — polar night and no sunset — polar night grayline windows: probe 20m, 30m, and 40m in the 15 minutes either side while the terminator crosses GB25.
10m is the headline band right now, with 20m as the dependable fallback if conditions soften.
This square sits in a mixed-region footprint and is best used as a planning center for portable, field-day, and home-station band decisions.
- Latitude zone
- high-latitude
- Local phase
- Daylight
- Aurora exposure
- watch during geomagnetic storms
- Grayline
- no sunrise — polar night / no sunset — polar night
- Best high band
- 10m
- Nearest city
- the GB25 operating area
● Local Band Quality Scorings
Use this local score for GB25, then compare the global live ranking oncurrent ham band conditionsbefore changing bands.
● Best DX Windows from GB25 — the GB25 operating area
Great-circle distance, short-path beam heading, the bands most likely open right now from GB25 to each DX region at SFI 137 / Kp 3, and a current verdict. "Open now" means a suitable band is scoring well on that path; "Try ~HH:MM" points at the next far-end grayline. Band picks and status are a planning heuristic, not a measurement.
| Target | Distance | Beam | Bands to try | Status |
|---|---|---|---|---|
| South America | 4,113 mi | 357° | 10m, 15m, 20m | Open now |
| Southern Africa | 4,326 mi | 89° | 10m, 15m, 20m | Open now |
| Oceania | 5,128 mi | 202° | 40m, 20m, 80m | Open now |
| North America | 8,086 mi | 323° | 10m, 15m, 20m | Open now |
| South Asia | 8,430 mi | 127° | 10m, 15m, 20m | Open now |
| Europe | 9,102 mi | 51° | 10m, 15m, 20m | Open now |
| East Asia / Japan | 9,742 mi | 197° | 40m, 20m, 80m | Open now |
● Band-by-Time Plan for GB25
A planning heuristic for the local day at GB25, built from sunrise no sunrise — polar night, sunset no sunset — polar night, SFI 137, and Kp 3. Not a measurement — a starting point for where to listen as the day turns.
Grayline enhancement — low bands reach long distances as the terminator passes.
High bands rising with the sun; check 10m for DX.
Peak high-band window — 10m and 15m open widest.
Second grayline peak — 20m holds, then hands off to 40m.
Low bands own the darkness — 40m for DX, 80m regional.
Recent local activity
Spots touching GB25 and the adjacent squares
These are the newest 10m, 15m, and 20m reports where one side of the path sits in GB25, GB26, GB24, GB35, GB15. This gives the page unique, local context instead of a generic solar snapshot.
Top DX targets
Where this grid is reaching right now
Contest preview
Next major contest outlook
Worked All Europe - SSB starts Sat, 12 Sep 2026 00:00:00 GMT. Current forecast from GB25: 10m EXCELLENT, 15m EXCELLENT, 20m GOOD. Current solar conditions (SFI 137, K 3) favor 10m, 15m, 20m for this contest weekend.
Open contest calendarNearby grids
Four adjacent squares for internal path checking
Regional hub links