9 places · sun position · panel angle
Solar data for Guinea-Bissau
Across the 9 places in Guinea-Bissau the best fixed tilt for solar panels is 13°, and flat ground gets 5.6 to 5.7 peak sun hours a day. Every number is computed for each place.
Solar power in Guinea-Bissau at a glance
Averages over 9 places with climate data, for a fixed array facing south.
- 5.55–5.58
- 5.58–5.60
- 5.60–5.62
- 5.62–5.65
- 5.65–5.67
Peak sun hours a day on flat ground. Each dot is one place.
The sunniest place in Guinea-Bissau is Gabú (Gabú) with 5.67 peak sun hours a day on flat ground; the least sunny are Xitole and 3 other places with 5.55. A 1 kWp array at its best angle makes from 1,633 kWh a year in Xitole to 1,665 kWh in Gabú — 1,643 kWh on average.
The best year-round tilt is 13° everywhere. Off-grid systems are sized for the darkest month and do better steeper, at 0° on average: at 70° that month brings 1.41 kWh per kWp a day in Contumo and 1.47 kWh in Gabú.
Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.
Sunniest places in Guinea-Bissau
Ranked by peak sun hours on flat ground: the yearly average of a day's sunshine energy (NASA POWER climatology). Output: 1 kWp at its best year-round angle.
| Rank | Place | Region | Sun hours/day | kWh per kWp a year | Best tilt |
|---|---|---|---|---|---|
| 1 | Gabú | Gabú | 5.67 | 1,665 | 13° |
| 2 | Bafatá | Bafatá | 5.64 | 1,658 | 13° |
| 3 | Reino de Antula | Bissau | 5.56 | 1,640 | 13° |
| 3 | Plaque | Bissau | 5.56 | 1,639 | 13° |
| 3 | Bissau | Bissau | 5.56 | 1,638 | 13° |
| 6 | Quelele | Bissau | 5.55 | 1,638 | 13° |
| 6 | Reino de Bandim | Bissau | 5.55 | 1,637 | 13° |
| 6 | Contumo | Bissau | 5.55 | 1,637 | 13° |
| 6 | Xitole | Bafatá | 5.55 | 1,633 | 13° |
Solar by region in Guinea-Bissau
Averages of the places in each region, sunniest first. Darkest month: what 1 kWp of off-grid panels at 70° makes a day in the worst month of the year.
Largest places in Guinea-Bissau at a glance
| Place | Latitude | Best tilt | Off-grid tilt | Sun hours/day (flat) |
|---|---|---|---|---|
| Bissau | 11.9° N | 13° | 0° | 5.56 |
| Gabú | 12.3° N | 13° | 0° | 5.67 |
| Contumo | 11.9° N | 13° | 0° | 5.55 |
| Reino de Bandim | 11.9° N | 13° | 0° | 5.55 |
| Bafatá | 12.2° N | 13° | 0° | 5.64 |
| Reino de Antula | 11.9° N | 13° | 0° | 5.56 |
| Quelele | 11.9° N | 13° | 0° | 5.55 |
| Plaque | 11.9° N | 13° | 0° | 5.56 |
| Xitole | 11.7° N | 13° | 0° | 5.55 |
Daylight and clock time in Guinea-Bissau
In Gabú (12.3° N), the northernmost place, the longest day of the year lasts 12 h 51 min and the shortest 11 h 24 min; in Xitole (11.7° N), the southernmost, 12 h 49 min and 11 h 26 min. Guinea-Bissau does not use daylight saving time: the clocks stay the same all year.
| Time zone | Places | UTC offset | Clocks change in 2026 |
|---|---|---|---|
| Africa/Bissau | 9 | UTC | no daylight saving time |